diff --git a/docs/architecture/adr-008-event-subscription.md b/docs/architecture/adr-008-event-subscription.md
new file mode 100644
index 000000000..40e391d3d
--- /dev/null
+++ b/docs/architecture/adr-008-event-subscription.md
@@ -0,0 +1,410 @@
+# ADR 008: RPC Client Event Subscription Mechanism
+
+## Changelog
+
+* 2020-07-23: Initial draft
+
+## Context
+
+The [Tendermint Light Client](../../light-client/) is one of many important
+applications that will make use of the [RPC client](../../rpc/) to query
+Tendermint full nodes for information relating to the blockchain.
+
+Tendermint servers (e.g. full nodes) provide an [event
+subscription][tm-event-subs] RPC endpoint to allow clients to receive
+notifications of specific events as they happen (currently via a WebSockets
+connection). We need to expose this subscription mechanism through the RPC client.
+
+In order to achieve this, we need:
+
+1. An ergonomic interface for the RPC client that allows developers to subscribe
+   to events produced by specific queries. Specifically, this interface must:
+   1. Offer **subscription** functionality, where:
+      1. A single **subscription** takes place to the **events** produced by a
+         **query** (the [PEG] for which, at the time of this writing, is located
+         [here][query-peg]).
+      2. Callers must be able to create multiple distinct subscriptions.
+      3. A subscription must offer an interface to allow for iteration over
+         incoming events only relevant to that subscription (i.e. it should
+         produce an **event stream**).
+      4. It must be possible to, from outside of the RPC client, receive events
+         from multiple subscriptions' event streams concurrently without
+         interfering with/blocking each other.
+      5. It must be possible to, from outside of the RPC client, handle
+         subscriptions' event streams without blocking other RPC operations.
+   2. Offer the ability to **unsubscribe** from specific queries (i.e. to
+      terminate specific subscriptions).
+2. An appropriate concurrency model for drivers of the transport layer that
+   allows the transport layer to operate independently of consumers of
+   subscriptions. This is so that consumers don't block transport layer
+   activities and vice-versa.
+
+## Decision
+
+### Assumptions
+
+* All blocking operations that deal with I/O must be `async`.
+* We will not be ["de-asyncifying" the RPC][issue-318] and will rather, in a
+  future ADR, propose a synchronous architecture as well should we need one.
+
+### Proposed Entities and Relationships
+
+The entities in the diagram below are described in the following subsections.
+
+![](assets/rpc-client-erd.png)
+
+### `Event`
+
+In terms of the subscription interface, this is ultimately what the end user is
+most interested in obtaining. The `Event` type's structure is dictated by the
+Tendermint RPC:
+
+```rust
+pub struct Event {
+    /// The query that produced the event.
+    pub query: String,
+    /// The data associated with the event (determines its `EventType`).
+    pub data: EventData,
+    /// Event type and attributes map.
+    pub events: Option<HashMap<String, Vec<String>>>,
+}
+
+pub enum EventData {
+    NewBlock {
+        block: Option<Block>,
+        result_begin_block: Option<BeginBlock>,
+        result_end_block: Option<EndBlock>,
+    },
+    Tx {
+        tx_result: TxResult,
+    },
+    // ...
+}
+```
+
+### `Subscription`
+
+A `Subscription` here is envisaged as an entity that implements the
+[Stream][futures-stream] trait, allowing its owner to asynchronously iterate
+through all of the relevant incoming events. Use of such a subscription should
+be as simple as:
+
+```rust
+while let Some(result_event) = subscription.next().await {
+   match result_event {
+      Ok(event) => { /* handle event */ },
+      Err(e) => { /* terminate subscription and report error */ },
+   }
+}
+
+// Terminate the subscription (i.e. unsubscribe and consume it).
+// Since a `Subscription` could be moved to and consumed in any asynchronous
+// context (and a distinct context to the original client entity that created
+// it), it would make sense that **unsubscribing** should be accessible from
+// that same context.
+subscription.terminate().await.unwrap();
+```
+
+Once [asynchronous destructors][async-drop] are available in Rust, the
+`terminate` method should no longer be necessary.
+
+For efficient routing of events to `Subscription`s, each `Subscription` should
+have some kind of unique identifier associated with it (a `SubscriptionId`).
+Each `Subscription` relates only to a single [`Query`](#query). Therefore, its
+publicly accessible fields may resemble the following:
+
+```rust
+pub struct Subscription {
+    pub id: SubscriptionId,
+    pub query: Query,
+    // ... other fields to help facilitate inter-task comms ...
+}
+```
+
+#### Buffering of Events
+
+Since the rate at which events could be produced by the remote RPC endpoint may
+differ from the rate at which the client process them, we need to buffer
+incoming events in a `Subscription`.
+
+Under the hood, a `Subscription` is envisaged to make use of some kind of
+**unbounded channel** to buffer incoming `Event`s, such as that provided by
+[Tokio's `mpsc`][tokio-mpsc]. We don't propose the use of bounded channels yet
+since they complicate the concurrency model significantly: we would need to
+cater for cases where we encounter full channels and provide for conventional or
+application-specific ways of dealing with those full channels (e.g. back-off, or
+back-pressure).
+
+#### Managing Multiple Simultaneous Subscriptions
+
+There may come instances where clients would want to initiate multiple
+subscriptions to different event types and consume them all from the same
+context. Since the `Subscription` struct implements the
+[`Stream`][futures-stream] trait, all of the [stream-related
+functionality][futures-stream-mod] should enhance the ergonomics of working with
+`Subscription`s.
+
+For example, if you wanted to iterate through two subscriptions at the same
+time, processing events in the order in which they are received by the client:
+
+```rust
+use futures::stream::select_all;
+
+// `subs1` and `subs2` are `Subscription`s:
+while let Some(res) = select_all(vec![subs1, subs2]).next().await {
+    match res {
+        Ok(event) => { /* handle event */ },
+        Err(e) => { /* handle error */ },
+    }
+}
+```
+
+### Client Model
+
+Users of the Tendermint RPC library may or may not want access to subscription
+functionality. Since such functionality comes with additional overhead in terms
+of resource usage and asynchronous task management, it would be optimal to
+provide two separate client traits: one that only implements non-subscription
+functionality, and one that only implements subscription functionality (where
+clients could either implement one or both traits).
+
+The interfaces of the two types of clients are envisaged as follows.
+
+#### `Client`
+
+This type of client would allow for interaction with all RPC endpoints except
+those pertaining to subscription management. In our current implementation, this
+client would only interact via the HTTP RPC endpoints (the `HttpClient` in the
+entity diagram above).
+
+**Note**: All `async` traits are facilitated by the use of [async-trait].
+
+```rust
+pub type Result<R> = std::result::Result<R, Error>;
+
+#[async_trait]
+pub trait Client: ClosableClient {
+    /// `/abci_info`: get information about the ABCI application.
+    async fn abci_info(&self) -> Result<abci_info::AbciInfo>;
+
+    /// `/abci_query`: query the ABCI application
+    async fn abci_query<V>(
+        &self,
+        path: Option<abci::Path>,
+        data: V,
+        height: Option<Height>,
+        prove: bool,
+    ) -> Result<abci_query::AbciQuery>
+    where
+        V: Into<Vec<u8>> + Send;
+
+    /// ...
+
+    /// Perform a general request against the RPC endpoint
+    async fn perform<R>(&self, request: R) -> Result<R::Response>
+    where
+        R: Request;
+}
+```
+
+#### `SubscriptionClient`
+
+A `SubscriptionClient` would be one that only provides access to subscription
+functionality. In our current implementation, this client would interact with a
+WebSocket connection to provide subscription functionality (the
+`WebSocketSubscriptionClient` in the entity diagram above).
+
+```rust
+#[async_trait]
+pub trait SubscriptionClient: ClosableClient {
+    /// `/subscribe`: subscribe to receive events produced by the given query.
+    async fn subscribe(&mut self, query: String) -> Result<Subscription>;
+}
+```
+
+#### `ClosableClient`
+
+This is not really a client in and of itself, but a trait that both the `Client`
+and `SubscriptionClient` need to implement. The reason for this common trait is
+that, depending on the transport layer, both types of clients may need a `close`
+method to gracefully terminate the client. An example of this would be when we
+implement a `WebSocketClient` that implements both the `Client` and
+`SubscriptionClient` traits simultaneously.
+
+```rust
+#[async_trait]
+pub trait ClosableClient {
+    /// Attempt to gracefully terminate the client.
+    async fn close(self) -> Result<()>;
+}
+```
+
+### Client Implementations
+
+We envisage 2 distinct client implementations at this point:
+
+* `HttpClient`, which only implements [`Client`](#client) (over HTTP).
+* `WebSocketSubscriptionClient`, which only implements
+  [`SubscriptionClient`](#subscriptionclient) (over a WebSocket connection).
+
+#### Handle-Driver Concurrency Model
+
+Depending on the underlying transport, a client may need a **transport driver**
+running in an asynchronous context. As in the example of a WebSocket connection,
+the rate at which one interacts with the WebSocket connection may differ to the
+rate at which one interacts with `Event`s being produced by a `Subscription`, so
+they necessarily need to run concurrently in different contexts.
+
+Implementation of such a transport driver is transport-specific. Short-lived
+request/response interactions (such as HTTP) would not require such a transport
+driver, whereas a WebSocket connection would.
+
+In cases where a driver is necessary, the client implementation would have to
+become a **handle** to the driver, facilitating communication with it across
+asynchronous tasks.
+
+### `Query`
+
+It is proposed that, using a *builder pattern*, we implement a subscription
+`Query` interface that implements the full [query PEG][query-peg] provided by
+the Go implementation of the RPC client. This would allow for compile-time
+validation of queries.
+
+The desired interface for constructing a query would look as follows:
+
+```rust
+// tm.event='NewBlock'
+let query = Query::from(EventType::NewBlock);
+
+// tm.event='Tx' AND tx.hash='XYZ'
+let query = Query::from(EventType::Tx).and_eq("tx.hash", "XYZ");
+
+// tm.event='Tx' AND tx.height=5
+let query = Query::from(EventType::Tx).and_eq("tx.height", 5);
+```
+
+This interface could be implemented along the following lines.
+
+```rust
+// Query would only have constructors that either specified an event type
+// (corresponding to a `tm.event='eventtype'` query) or a condition. There must
+// be no constructor that allows for construction of an empty query.
+pub struct Query {
+    // A query can only match zero or one type of event.
+    event_type: Option<EventType>,
+    // A query can contain zero or more conditions.
+    conditions: Vec<Condition>,
+}
+
+impl From<EventType> for Query {
+    fn from(event_type: EventType) -> Self {
+        Self {
+            event_type: Some(event_type),
+            conditions: Vec::new(),
+        }
+    }
+}
+
+impl Query {
+    // An example of a constructor for `Operation::Eq`.
+    pub fn eq(key: &str, value: impl Into<Operand>) -> Self {
+        Self {
+            event_type: None,
+            conditions: vec![Condition::new(key, Operation::Eq(value.into()))],
+        }
+    }
+
+    // ...
+
+    // Allows for a simple builder pattern.
+    pub fn and_eq(mut self, key: &str, value: impl Into<Operand>) -> Self {
+        self.conditions.push(Condition::new(key, Operation::Eq(value.into())));
+        self
+    }
+
+    // ...
+}
+
+// Derived from https://github.com/tendermint/tendermint/blob/master/types/events.go
+pub enum EventType {
+    NewBlock,
+    NewBlockHeader,
+    NewEvidence,
+    Tx,
+    ValidatorSetUpdates,
+}
+
+pub struct Condition {
+    key: String,
+    op: Operation,
+}
+
+pub enum Operation {
+    Eq(Operand),
+    Lt(Operand),
+    Lte(Operand),
+    Gt(Operand),
+    Gte(Operand),
+    Contains(Operand),
+    Exists,
+}
+
+// According to https://docs.tendermint.com/master/rpc/#/Websocket/subscribe,
+// an operand can be a string, number, date or time. We differentiate here
+// between integer and floating point numbers.
+//
+// It would be most useful to implement `From` traits for each of the different
+// operand types to the `Operand` enum, as this would improve ergonomics.
+pub enum Operand {
+    String(String),
+    Integer(i64),
+    Float(f64),
+    Date(chrono::Date),
+    DateTime(chrono::DateTime),
+}
+```
+
+## Status
+
+Proposed
+
+## Consequences
+
+### Positive
+
+* Provides relatively intuitive developer ergonomics (`Subscription` iteration
+  to produce `Event`s).
+* Mocking client functionality is relatively easy, allowing for a greater
+  variety of testing (including simulating transport-level failures).
+
+### Negative
+
+* Requires an additional concurrent, potentially long-running `async` task to be
+  concerned about (partially mitigated by the [handle-driver concurrency
+  model](#handle-driver-concurrency-model)).
+
+### Neutral
+
+None
+
+## References
+
+* [\#313](https://github.com/informalsystems/tendermint-rs/issues/313)
+* [\#311](https://github.com/informalsystems/tendermint-rs/issues/311)
+* [\#458][pr-458]
+* [Tendermint RPC subscription endpoint][tm-event-subs]
+
+[tm-event-subs]: https://docs.tendermint.com/master/rpc/#/Websocket/subscribe
+[client]: https://github.com/informalsystems/tendermint-rs/blob/06ed36eaf7a74c0357b86d1d7450a2fec52ed6a0/rpc/src/client.rs#L20
+[query-peg]: https://github.com/tendermint/tendermint/blob/98c595312af02037843b8fe74f0ee0625665448e/libs/pubsub/query/query.peg
+[tm-go-query]: https://github.com/tendermint/tendermint/blob/98c595312af02037843b8fe74f0ee0625665448e/libs/pubsub/pubsub.go#L64
+[PEG]: https://en.wikipedia.org/wiki/Parsing_expression_grammar
+[futures-stream]: https://docs.rs/futures/*/futures/stream/trait.Stream.html
+[pr-458]: https://github.com/informalsystems/tendermint-rs/pull/458
+[issue-318]: https://github.com/informalsystems/tendermint-rs/issues/318
+[tokio-sync]: https://docs.rs/tokio/*/tokio/sync/index.html
+[async-trait]: https://docs.rs/async-trait/*/async_trait/index.html
+[async-drop]: https://internals.rust-lang.org/t/asynchronous-destructors/11127
+[tokio-mpsc]: https://docs.rs/tokio/*/tokio/sync/mpsc/index.html
+[futures-stream-mod]: https://docs.rs/futures/*/futures/stream/index.html
+
diff --git a/docs/architecture/assets/rpc-client-erd.graphml b/docs/architecture/assets/rpc-client-erd.graphml
new file mode 100644
index 000000000..b136cd350
--- /dev/null
+++ b/docs/architecture/assets/rpc-client-erd.graphml
@@ -0,0 +1,424 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<graphml xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:java="http://www.yworks.com/xml/yfiles-common/1.0/java" xmlns:sys="http://www.yworks.com/xml/yfiles-common/markup/primitives/2.0" xmlns:x="http://www.yworks.com/xml/yfiles-common/markup/2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:y="http://www.yworks.com/xml/graphml" xmlns:yed="http://www.yworks.com/xml/yed/3" xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns http://www.yworks.com/xml/schema/graphml/1.1/ygraphml.xsd">
+  <!--Created by yEd 3.20-->
+  <key attr.name="Description" attr.type="string" for="graph" id="d0"/>
+  <key for="port" id="d1" yfiles.type="portgraphics"/>
+  <key for="port" id="d2" yfiles.type="portgeometry"/>
+  <key for="port" id="d3" yfiles.type="portuserdata"/>
+  <key attr.name="url" attr.type="string" for="node" id="d4"/>
+  <key attr.name="description" attr.type="string" for="node" id="d5"/>
+  <key for="node" id="d6" yfiles.type="nodegraphics"/>
+  <key for="graphml" id="d7" yfiles.type="resources"/>
+  <key attr.name="url" attr.type="string" for="edge" id="d8"/>
+  <key attr.name="description" attr.type="string" for="edge" id="d9"/>
+  <key for="edge" id="d10" yfiles.type="edgegraphics"/>
+  <graph edgedefault="directed" id="G">
+    <data key="d0" xml:space="preserve"/>
+    <node id="n0">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="155.0" x="181.5" y="416.0"/>
+          <y:Fill color="#DDDDDD" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="39.79296875" x="57.603515625" xml:space="preserve" y="19.0">Client<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n1">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="238.0" x="653.5" y="416.0"/>
+          <y:Fill color="#DDDDDD" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="116.833984375" x="60.5830078125" xml:space="preserve" y="19.0">SubscriptionClient<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n2">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="155.0" x="181.5" y="299.0"/>
+          <y:Fill color="#BBDCFC" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="65.46875" x="44.765625" xml:space="preserve" y="19.0">HttpClient<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n3">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="238.0" x="653.5" y="299.0"/>
+          <y:Fill color="#BBDCFC" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="188.419921875" x="24.7900390625" xml:space="preserve" y="19.0">WebSocketSubscriptionClient<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n4">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="196.0" x="963.0" y="416.0"/>
+          <y:Fill color="#DDDDDD" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="150.2685546875" x="22.86572265625" xml:space="preserve" y="19.0">futures::stream::Stream<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n5">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="155.0" x="983.5" y="299.0"/>
+          <y:Fill color="#BBDCFC" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="81.041015625" x="36.9794921875" xml:space="preserve" y="19.0">Subscription<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n6">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="155.0" x="983.5" y="182.0"/>
+          <y:Fill color="#BBDCFC" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="39.7998046875" x="57.60009765625" xml:space="preserve" y="19.0">Event<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n7">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="155.0" x="417.5" y="182.0"/>
+          <y:Fill color="#DFC0FF" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="dashed" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="123.0615234375" x="15.96923828125" xml:space="preserve" y="19.0">SubscriptionRouter<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n8">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="220.0" x="662.5" y="182.0"/>
+          <y:Fill color="#DFC0FF" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="dashed" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="189.9580078125" x="15.02099609375" xml:space="preserve" y="19.0">WebSocketSubscriptionDriver<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n9" yfiles.foldertype="group">
+      <data key="d4" xml:space="preserve"/>
+      <data key="d6">
+        <y:ProxyAutoBoundsNode>
+          <y:Realizers active="0">
+            <y:GroupNode>
+              <y:Geometry height="188.0" width="381.0" x="804.0" y="607.0"/>
+              <y:Fill color="#F5F5F5" transparent="false"/>
+              <y:BorderStyle color="#000000" type="dashed" width="1.0"/>
+              <y:NodeLabel alignment="right" autoSizePolicy="node_width" backgroundColor="#EBEBEB" borderDistance="0.0" fontFamily="Helvetica" fontSize="15" fontStyle="plain" hasLineColor="false" height="19.0" horizontalTextPosition="center" iconTextGap="4" modelName="internal" modelPosition="t" textColor="#000000" verticalTextPosition="bottom" visible="true" width="381.0" x="0.0" xml:space="preserve" y="0.0">Legend</y:NodeLabel>
+              <y:Shape type="roundrectangle"/>
+              <y:State closed="false" closedHeight="50.0" closedWidth="50.0" innerGraphDisplayEnabled="false"/>
+              <y:Insets bottom="15" bottomF="15.0" left="15" leftF="15.0" right="15" rightF="15.0" top="15" topF="15.0"/>
+              <y:BorderInsets bottom="6" bottomF="6.0" left="6" leftF="6.0" right="5" rightF="5.0" top="0" topF="0.0"/>
+            </y:GroupNode>
+            <y:GroupNode>
+              <y:Geometry height="50.0" width="50.0" x="0.0" y="60.0"/>
+              <y:Fill color="#F5F5F5" transparent="false"/>
+              <y:BorderStyle color="#000000" type="dashed" width="1.0"/>
+              <y:NodeLabel alignment="right" autoSizePolicy="node_width" backgroundColor="#EBEBEB" borderDistance="0.0" fontFamily="Dialog" fontSize="15" fontStyle="plain" hasLineColor="false" height="21.666015625" horizontalTextPosition="center" iconTextGap="4" modelName="internal" modelPosition="t" textColor="#000000" verticalTextPosition="bottom" visible="true" width="63.75830078125" x="-6.879150390625" xml:space="preserve" y="0.0">Folder 1</y:NodeLabel>
+              <y:Shape type="roundrectangle"/>
+              <y:State closed="true" closedHeight="50.0" closedWidth="50.0" innerGraphDisplayEnabled="false"/>
+              <y:Insets bottom="5" bottomF="5.0" left="5" leftF="5.0" right="5" rightF="5.0" top="5" topF="5.0"/>
+              <y:BorderInsets bottom="0" bottomF="0.0" left="0" leftF="0.0" right="0" rightF="0.0" top="0" topF="0.0"/>
+            </y:GroupNode>
+          </y:Realizers>
+        </y:ProxyAutoBoundsNode>
+      </data>
+      <graph edgedefault="directed" id="n9:">
+        <node id="n9::n0">
+          <data key="d6">
+            <y:ShapeNode>
+              <y:Geometry height="56.0" width="155.0" x="825.0" y="641.0"/>
+              <y:Fill color="#BBDCFC" transparent="false"/>
+              <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+              <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="32.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="102.8271484375" x="26.08642578125" xml:space="preserve" y="12.0">Public Concrete
+Type<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+              <y:Shape type="roundrectangle"/>
+            </y:ShapeNode>
+          </data>
+        </node>
+        <node id="n9::n1">
+          <data key="d6">
+            <y:ShapeNode>
+              <y:Geometry height="56.0" width="155.0" x="1010.0" y="641.0"/>
+              <y:Fill color="#DDDDDD" transparent="false"/>
+              <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+              <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="32.0" x="61.5" xml:space="preserve" y="19.0">Trait<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+              <y:Shape type="roundrectangle"/>
+            </y:ShapeNode>
+          </data>
+        </node>
+        <node id="n9::n2">
+          <data key="d6">
+            <y:ShapeNode>
+              <y:Geometry height="56.0" width="155.0" x="825.0" y="718.0"/>
+              <y:Fill color="#DFC0FF" transparent="false"/>
+              <y:BorderStyle color="#333333" raised="false" type="dashed" width="1.0"/>
+              <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="46.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="139.392578125" x="7.8037109375" xml:space="preserve" y="5.0">Private Concrete
+Type (Implementation
+Detail)<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+              <y:Shape type="roundrectangle"/>
+            </y:ShapeNode>
+          </data>
+        </node>
+      </graph>
+    </node>
+    <node id="n10">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="155.0" x="417.5" y="416.0"/>
+          <y:Fill color="#BBDCFC" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="42.1240234375" x="56.43798828125" xml:space="preserve" y="19.0">Query<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n11">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="155.0" x="983.5" y="65.0"/>
+          <y:Fill color="#BBDCFC" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="70.923828125" x="42.0380859375" xml:space="preserve" y="19.0">EventType<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n12">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="109.0" x="242.25" y="607.0"/>
+          <y:Fill color="#BBDCFC" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="63.1513671875" x="22.92431640625" xml:space="preserve" y="19.0">Condition<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n13">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="109.0" x="429.5" y="607.0"/>
+          <y:Fill color="#BBDCFC" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="65.482421875" x="21.7587890625" xml:space="preserve" y="19.0">Operation<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n14">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="109.0" x="616.75" y="607.0"/>
+          <y:Fill color="#BBDCFC" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="58.482421875" x="25.2587890625" xml:space="preserve" y="19.0">Operand<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <node id="n15">
+      <data key="d6">
+        <y:ShapeNode>
+          <y:Geometry height="56.0" width="155.0" x="1198.0" y="182.0"/>
+          <y:Fill color="#BBDCFC" transparent="false"/>
+          <y:BorderStyle color="#000000" raised="false" type="line" width="1.0"/>
+          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Helvetica" fontSize="14" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" textColor="#000000" verticalTextPosition="bottom" visible="true" width="92.716796875" x="31.1416015625" xml:space="preserve" y="19.0">SubscriptionId<y:LabelModel><y:SmartNodeLabelModel distance="4.0"/></y:LabelModel><y:ModelParameter><y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/></y:ModelParameter></y:NodeLabel>
+          <y:Shape type="roundrectangle"/>
+        </y:ShapeNode>
+      </data>
+    </node>
+    <edge id="e0" source="n0" target="n2">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
+          <y:LineStyle color="#000000" type="dashed" width="1.0"/>
+          <y:Arrows source="white_delta" target="none"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="16.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="66.021484375" x="9.9892578125" xml:space="preserve" y="-55.978271484375">Implements<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="6.283185307179586" distance="43.0" distanceToCenter="true" position="right" ratio="1.0" segment="-1"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e1" source="n1" target="n3">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
+          <y:LineStyle color="#000000" type="dashed" width="1.0"/>
+          <y:Arrows source="white_delta" target="none"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="16.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="66.021484375" x="11.9892578125" xml:space="preserve" y="-55.978271484375">Implements<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="6.283185307179586" distance="45.0" distanceToCenter="true" position="right" ratio="1.0" segment="-1"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e2" source="n4" target="n5">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
+          <y:LineStyle color="#000000" type="dashed" width="1.0"/>
+          <y:Arrows source="white_delta" target="none"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="16.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="66.021484375" x="8.9892578125" xml:space="preserve" y="-55.978271484375">Implements<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="6.283185307179586" distance="42.0" distanceToCenter="true" position="right" ratio="1.0" segment="-1"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e3" source="n1" target="n5">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="14.0">
+            <y:Point x="772.5" y="518.0"/>
+            <y:Point x="1384.0" y="518.0"/>
+            <y:Point x="1384.0" y="341.0"/>
+          </y:Path>
+          <y:LineStyle color="#000000" type="line" width="1.0"/>
+          <y:Arrows source="none" target="plain"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="16.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="54.6953125" x="7.049630916341812" xml:space="preserve" y="7.7301287459196715">Produces<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="0.0" distance="7.049630916341808" distanceToCenter="false" position="left" ratio="0.08281995252786727" segment="0"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e4" source="n5" target="n6">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
+          <y:LineStyle color="#000000" type="line" width="1.0"/>
+          <y:Arrows source="none" target="plain"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="16.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="54.6953125" x="2.65234375" xml:space="preserve" y="-20.978271484375">Produces<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="0.0" distance="30.0" distanceToCenter="true" position="right" ratio="0.0" segment="0"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e5" source="n3" target="n7">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0">
+            <y:Point x="603.0" y="210.0"/>
+          </y:Path>
+          <y:LineStyle color="#000000" type="line" width="1.0"/>
+          <y:Arrows source="diamond" target="crows_foot_one"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="28.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="31.33984375" x="-128.19124552027347" xml:space="preserve" y="-51.12891826108353">Has/
+Uses<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="6.283185307179586" distance="33.36407661646361" distanceToCenter="true" position="left" ratio="0.4515565075001525" segment="0"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e6" source="n3" target="n8">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
+          <y:LineStyle color="#000000" type="line" width="1.0"/>
+          <y:Arrows source="diamond" target="crows_foot_one"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="28.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="31.33984375" x="5.5326121014416" xml:space="preserve" y="-32.978271484375">Has/
+Uses<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="6.283185307179586" distance="21.202533976441593" distanceToCenter="true" position="right" ratio="0.0" segment="0"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e7" source="n1" target="n10">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
+          <y:LineStyle color="#000000" type="dashed" width="1.0"/>
+          <y:Arrows source="none" target="plain"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="16.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="31.33984375" x="-32.72149658203125" xml:space="preserve" y="4.0">Uses<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="6.283185307179586" distance="12.0" distanceToCenter="true" position="left" ratio="-3.6171875" segment="-1"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e8" source="n11" target="n6">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
+          <y:LineStyle color="#000000" type="line" width="1.0"/>
+          <y:Arrows source="crows_foot_one" target="diamond"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="16.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="25.33984375" x="17.330078125" xml:space="preserve" y="39.978271484375">Has<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="0.0" distance="30.0" distanceToCenter="true" position="left" ratio="1.0" segment="-1"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e9" source="n10" target="n11">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0">
+            <y:Point x="495.0" y="564.0"/>
+            <y:Point x="1425.0" y="564.0"/>
+            <y:Point x="1425.0" y="93.0"/>
+          </y:Path>
+          <y:LineStyle color="#000000" type="line" width="1.0"/>
+          <y:Arrows source="diamond" target="crows_foot_one_optional"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="16.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="25.33984375" x="5.330078125" xml:space="preserve" y="17.021484375">Has<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="6.283185307179586" distance="18.0" distanceToCenter="true" position="left" ratio="0.1518987341772152" segment="0"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e10" source="n10" target="n12">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="-45.227226860834094" sy="27.989766486853966" tx="0.0" ty="0.0">
+            <y:Point x="449.7727731391659" y="563.0"/>
+            <y:Point x="296.75" y="563.0"/>
+          </y:Path>
+          <y:LineStyle color="#000000" type="line" width="1.0"/>
+          <y:Arrows source="diamond" target="crows_foot_many_optional"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="16.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="25.33984375" x="-40.8696012197081" xml:space="preserve" y="10.266459209047525">Has<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="0.0" distance="15.529764495592758" distanceToCenter="false" position="right" ratio="0.06795730018109808" segment="0"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e11" source="n12" target="n13">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
+          <y:LineStyle color="#000000" type="line" width="1.0"/>
+          <y:Arrows source="diamond" target="crows_foot_one"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="16.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="25.33984375" x="2.04168701171875" xml:space="preserve" y="-22.0">Has<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="6.283185307179586" distance="14.0" distanceToCenter="true" position="left" ratio="-2.919921875" segment="-1"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e12" source="n13" target="n14">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
+          <y:LineStyle color="#000000" type="line" width="1.0"/>
+          <y:Arrows source="diamond" target="crows_foot_one_optional"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="16.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="25.33984375" x="1.04168701171875" xml:space="preserve" y="-22.0">Has<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="6.283185307179586" distance="14.0" distanceToCenter="true" position="left" ratio="-3.919921875" segment="-1"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+    <edge id="e13" source="n5" target="n15">
+      <data key="d10">
+        <y:PolyLineEdge>
+          <y:Path sx="0.0" sy="-11.0" tx="0.0" ty="0.0">
+            <y:Point x="1275.5" y="316.0"/>
+          </y:Path>
+          <y:LineStyle color="#000000" type="line" width="1.0"/>
+          <y:Arrows source="diamond" target="none"/>
+          <y:EdgeLabel alignment="center" configuration="AutoFlippingLabel" distance="2.0" fontFamily="Helvetica" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="16.0" horizontalTextPosition="center" iconTextGap="4" modelName="custom" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" verticalTextPosition="bottom" visible="true" width="25.33984375" x="15.640522416141039" xml:space="preserve" y="-21.0">Has<y:LabelModel><y:SmartEdgeLabelModel autoRotationEnabled="false" defaultAngle="0.0" defaultDistance="10.0"/></y:LabelModel><y:ModelParameter><y:SmartEdgeLabelModelParameter angle="6.283185307179586" distance="13.0" distanceToCenter="true" position="left" ratio="0.0889908256880734" segment="0"/></y:ModelParameter><y:PreferredPlacementDescriptor angle="0.0" angleOffsetOnRightSide="0" angleReference="absolute" angleRotationOnRightSide="co" distance="-1.0" frozen="true" placement="anywhere" side="anywhere" sideReference="relative_to_edge_flow"/></y:EdgeLabel>
+          <y:BendStyle smoothed="false"/>
+        </y:PolyLineEdge>
+      </data>
+    </edge>
+  </graph>
+  <data key="d7">
+    <y:Resources/>
+  </data>
+</graphml>
diff --git a/docs/architecture/assets/rpc-client-erd.png b/docs/architecture/assets/rpc-client-erd.png
new file mode 100644
index 000000000..3bfb5b8c5
Binary files /dev/null and b/docs/architecture/assets/rpc-client-erd.png differ