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cyclonedds.xsd
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cyclonedds.xsd
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<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="https://cdds.io/config" xmlns:config="https://cdds.io/config">
<xs:element name="CycloneDDS">
<xs:annotation>
<xs:documentation>
CycloneDDS configuration</xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" ref="config:Domain"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Domain">
<xs:annotation>
<xs:documentation>
<p>The General element specifying Domain related settings.</p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:all>
<xs:element minOccurs="0" ref="config:Compatibility"/>
<xs:element minOccurs="0" ref="config:Discovery"/>
<xs:element minOccurs="0" ref="config:General"/>
<xs:element minOccurs="0" ref="config:Internal"/>
<xs:element minOccurs="0" ref="config:Partitioning"/>
<xs:element minOccurs="0" ref="config:SSL"/>
<xs:element minOccurs="0" ref="config:Security"/>
<xs:element minOccurs="0" ref="config:SharedMemory"/>
<xs:element minOccurs="0" ref="config:Sizing"/>
<xs:element minOccurs="0" ref="config:TCP"/>
<xs:element minOccurs="0" ref="config:Threads"/>
<xs:element minOccurs="0" ref="config:Tracing"/>
</xs:all>
<xs:attribute name="Id">
<xs:annotation>
<xs:documentation>
<p>Domain id this configuration applies to, or "any" if it applies to all domain ids.</p>
<p>The default value is: <code>any</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:complexType>
</xs:element>
<xs:element name="Compatibility">
<xs:annotation>
<xs:documentation>
<p>The Compatibility element allows you to specify various settings related to compatibility with standards and with other DDSI implementations.</p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:all>
<xs:element minOccurs="0" ref="config:AssumeRtiHasPmdEndpoints"/>
<xs:element minOccurs="0" ref="config:ExplicitlyPublishQosSetToDefault"/>
<xs:element minOccurs="0" ref="config:ManySocketsMode"/>
<xs:element minOccurs="0" ref="config:StandardsConformance"/>
</xs:all>
</xs:complexType>
</xs:element>
<xs:element name="AssumeRtiHasPmdEndpoints" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>This option assumes ParticipantMessageData endpoints required by the liveliness protocol are present in RTI participants even when not properly advertised by the participant discovery protocol.</p>
<p>The default value is: <code>false</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="ExplicitlyPublishQosSetToDefault" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>This element specifies whether QoS settings set to default values are explicitly published in the discovery protocol. Implementations are to use the default value for QoS settings not published, which allows a significant reduction of the amount of data that needs to be exchanged for the discovery protocol, but this requires all implementations to adhere to the default values specified by the specifications.</p>
<p>When interoperability is required with an implementation that does not follow the specifications in this regard, setting this option to true will help.</p>
<p>The default value is: <code>false</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="ManySocketsMode">
<xs:annotation>
<xs:documentation>
<p>This option specifies whether a network socket will be created for each domain participant on a host. The specification seems to assume that each participant has a unique address, and setting this option will ensure this to be the case. This is not the default.</p>
<p>Disabling it slightly improves performance and reduces network traffic somewhat. It also causes the set of port numbers needed by Cyclone DDS to become predictable, which may be useful for firewall and NAT configuration.</p>
<p>The default value is: <code>single</code></p></xs:documentation>
</xs:annotation>
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="false"/>
<xs:enumeration value="true"/>
<xs:enumeration value="single"/>
<xs:enumeration value="none"/>
<xs:enumeration value="many"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="StandardsConformance">
<xs:annotation>
<xs:documentation>
<p>This element sets the level of standards conformance of this instance of the Cyclone DDS Service. Stricter conformance typically means less interoperability with other implementations. Currently, three modes are defined:</p>
<ul><li><i>pedantic</i>: very strictly conform to the specification, ultimately for compliance testing, but currently of little value because it adheres even to what will most likely turn out to be editing errors in the DDSI standard. Arguably, as long as no errata have been published, the current text is in effect, and that is what pedantic currently does.</li>
<li><i>strict</i>: a relatively less strict view of the standard than does pedantic: it follows the established behaviour where the standard is obviously in error.</li>
<li><i>lax</i>: attempt to provide the smoothest possible interoperability, anticipating future revisions of elements in the standard in areas that other implementations do not adhere to, even though there is no good reason not to.</li></ul>
<p>The default value is: <code>lax</code></p></xs:documentation>
</xs:annotation>
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="lax"/>
<xs:enumeration value="strict"/>
<xs:enumeration value="pedantic"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Discovery">
<xs:annotation>
<xs:documentation>
<p>The Discovery element allows you to specify various parameters related to the discovery of peers.</p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:all>
<xs:element minOccurs="0" ref="config:DSGracePeriod"/>
<xs:element minOccurs="0" ref="config:DefaultMulticastAddress"/>
<xs:element minOccurs="0" ref="config:EnableTopicDiscoveryEndpoints"/>
<xs:element minOccurs="0" ref="config:ExternalDomainId"/>
<xs:element minOccurs="0" ref="config:LeaseDuration"/>
<xs:element minOccurs="0" ref="config:MaxAutoParticipantIndex"/>
<xs:element minOccurs="0" ref="config:ParticipantIndex"/>
<xs:element minOccurs="0" ref="config:Peers"/>
<xs:element minOccurs="0" ref="config:Ports"/>
<xs:element minOccurs="0" ref="config:SPDPInterval"/>
<xs:element minOccurs="0" ref="config:SPDPMulticastAddress"/>
<xs:element minOccurs="0" ref="config:Tag"/>
</xs:all>
</xs:complexType>
</xs:element>
<xs:element name="DSGracePeriod" type="config:duration_inf">
<xs:annotation>
<xs:documentation>
<p>This setting controls for how long endpoints discovered via a Cloud discovery service will survive after the discovery service disappears, allowing reconnection without loss of data when the discovery service restarts (or another instance takes over).</p>
<p>Valid values are finite durations with an explicit unit or the keyword 'inf' for infinity. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>30 s</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="DefaultMulticastAddress" type="xs:string">
<xs:annotation>
<xs:documentation>
<p>This element specifies the default multicast address for all traffic other than participant discovery packets. It defaults to Discovery/SPDPMulticastAddress.</p>
<p>The default value is: <code>auto</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="EnableTopicDiscoveryEndpoints" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>This element controls whether the built-in endpoints for topic discovery are created and used to exchange topic discovery information.</p>
<p>The default value is: <code>false</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="ExternalDomainId" type="xs:string">
<xs:annotation>
<xs:documentation>
<p>An override for the domain id is used to discovery and determine the port number mapping. This allows the creating of multiple domains in a single process while making them appear as a single domain on the network. The value "default" disables the override.</p>
<p>The default value is: <code>default</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="LeaseDuration" type="config:duration">
<xs:annotation>
<xs:documentation>
<p>This setting controls the default participant lease duration.<p>
<p>The unit must be specified explicitly. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>10 s</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MaxAutoParticipantIndex" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element specifies the maximum DDSI participant index selected by this instance of the Cyclone DDS service if the Discovery/ParticipantIndex is "auto".</p>
<p>The default value is: <code>9</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="ParticipantIndex" type="xs:string">
<xs:annotation>
<xs:documentation>
<p>This element specifies the DDSI participant index used by this instance of the Cyclone DDS service for discovery purposes. Only one such participant id is used, independent of the number of actual DomainParticipants on the node. It is either:</p>
<ul><li><i>auto</i>: which will attempt to automatically determine an available participant index (see also Discovery/MaxAutoParticipantIndex), or</li>
<li>a non-negative integer, or</li>
<li><i>none</i>: which causes it to use arbitrary port numbers for unicast sockets which entirely removes the constraints on the participant index but makes unicast discovery impossible, or</li><li><i>default</i>: use <i>none</i> if multicast discovery is used on all selected network interfaces, else <i>auto</i>.</li></ul>
<p>The default value is: <code>default</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="Peers">
<xs:annotation>
<xs:documentation>
<p>This element statically configures addresses for discovery.</p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" maxOccurs="unbounded" ref="config:Peer"/>
</xs:sequence>
<xs:attribute name="AddLocalhost" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>This attribute determines controls the localhost will automatically be added to the list of peers:.</p>
<ul><li><i>false</i>: never</li>
<li><i>true</i>: always</li>
<li><i>default</i>: if multicast discovery is unavailable<li></ul>
<p>The default value is: <code>default</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:complexType>
</xs:element>
<xs:element name="Peer">
<xs:annotation>
<xs:documentation>
<p>This element statically configures addresses for discovery.</p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:attribute name="Address" use="required">
<xs:annotation>
<xs:documentation>
<p>This element specifies an IP address to which discovery packets must be sent, in addition to the default multicast address (see also General/AllowMulticast). Both hostnames and a numerical IP address are accepted; the hostname or IP address may be suffixed with :PORT to explicitly set the port to which it must be sent. Multiple Peers may be specified.</p>
<p>The default value is: <code>&lt;empty&gt;</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:complexType>
</xs:element>
<xs:element name="Ports">
<xs:annotation>
<xs:documentation>
<p>The Ports element specifies various parameters related to the port numbers used for discovery. These all have default values specified by the DDSI 2.1 specification and rarely need to be changed.</p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:all>
<xs:element minOccurs="0" ref="config:Base"/>
<xs:element minOccurs="0" ref="config:DomainGain"/>
<xs:element minOccurs="0" ref="config:MulticastDataOffset"/>
<xs:element minOccurs="0" ref="config:MulticastMetaOffset"/>
<xs:element minOccurs="0" ref="config:ParticipantGain"/>
<xs:element minOccurs="0" ref="config:UnicastDataOffset"/>
<xs:element minOccurs="0" ref="config:UnicastMetaOffset"/>
</xs:all>
</xs:complexType>
</xs:element>
<xs:element name="Base" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element specifies the base port number (refer to the DDSI 2.1 specification, section 9.6.1, constant PB).</p>
<p>The default value is: <code>7400</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="DomainGain" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element specifies the domain gain, relating domain ids to sets of port numbers (refer to the DDSI 2.1 specification, section 9.6.1, constant DG).</p>
<p>The default value is: <code>250</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MulticastDataOffset" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element specifies the port number for multicast data traffic (refer to the DDSI 2.1 specification, section 9.6.1, constant d2).</p>
<p>The default value is: <code>1</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MulticastMetaOffset" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element specifies the port number for multicast meta traffic (refer to the DDSI 2.1 specification, section 9.6.1, constant d0).</p>
<p>The default value is: <code>0</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="ParticipantGain" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element specifies the participant gain, relating p0, participant index to sets of port numbers (refer to the DDSI 2.1 specification, section 9.6.1, constant PG).</p>
<p>The default value is: <code>2</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="UnicastDataOffset" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element specifies the port number for unicast data traffic (refer to the DDSI 2.1 specification, section 9.6.1, constant d3).</p>
<p>The default value is: <code>11</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="UnicastMetaOffset" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element specifies the port number for unicast meta traffic (refer to the DDSI 2.1 specification, section 9.6.1, constant d1).</p>
<p>The default value is: <code>10</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="SPDPInterval" type="config:duration">
<xs:annotation>
<xs:documentation>
<p>This element specifies the interval between spontaneous transmissions of participant discovery packets. The special value "default" corresponds to approximately 80% of the participant lease duration with a maximum of 30s.</p>
<p>The unit must be specified explicitly. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>default</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="SPDPMulticastAddress" type="xs:string">
<xs:annotation>
<xs:documentation>
<p>This element specifies the multicast address used as the destination for the participant discovery packets. In IPv4 mode the default is the (standardised) 239.255.0.1, in IPv6 mode it becomes ff02::ffff:239.255.0.1, which is a non-standardised link-local multicast address.</p>
<p>The default value is: <code>239.255.0.1</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="Tag" type="xs:string">
<xs:annotation>
<xs:documentation>
<p>String extension for domain id that remote participants must match to be discovered.</p>
<p>The default value is: <code>&lt;empty&gt;</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="General">
<xs:annotation>
<xs:documentation>
<p>The General element specifies overall Cyclone DDS service settings.</p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:all>
<xs:element minOccurs="0" ref="config:AllowMulticast"/>
<xs:element minOccurs="0" ref="config:DontRoute"/>
<xs:element minOccurs="0" ref="config:EnableMulticastLoopback"/>
<xs:element minOccurs="0" ref="config:EntityAutoNaming"/>
<xs:element minOccurs="0" ref="config:ExternalNetworkAddress"/>
<xs:element minOccurs="0" ref="config:ExternalNetworkMask"/>
<xs:element minOccurs="0" ref="config:FragmentSize"/>
<xs:element minOccurs="0" ref="config:Interfaces"/>
<xs:element minOccurs="0" ref="config:MaxMessageSize"/>
<xs:element minOccurs="0" ref="config:MaxRexmitMessageSize"/>
<xs:element minOccurs="0" ref="config:MulticastRecvNetworkInterfaceAddresses"/>
<xs:element minOccurs="0" ref="config:MulticastTimeToLive"/>
<xs:element minOccurs="0" ref="config:RedundantNetworking"/>
<xs:element minOccurs="0" ref="config:Transport"/>
<xs:element minOccurs="0" ref="config:UseIPv6"/>
</xs:all>
</xs:complexType>
</xs:element>
<xs:element name="AllowMulticast">
<xs:annotation>
<xs:documentation>
<p>This element controls the default for the per-network interface setting whether Cyclone DDS uses multicasts for discovery and data traffic.</p>
<p>It is a comma-separated list of some of the following keywords: "spdp", "asm", "ssm", or either of "false" or "true", or "default".</p>
<ul>
<li><i>spdp</i>: enables the use of ASM (any-source multicast) for participant discovery, joining the multicast group on the discovery socket, transmitting SPDP messages to this group, but never advertising nor using any multicast address in any discovery message, thus forcing unicast communications for all endpoint discovery and user data.</li>
<li><i>asm</i>: enables the use of ASM for all traffic, including receiving SPDP but not transmitting SPDP messages via multicast</li>
<li><i>ssm</i>: enables the use of SSM (source-specific multicast) for all non-SPDP traffic (if supported)</li></ul>
<p>When set to "false" all multicasting is disabled; "true"enables the full use of multicasts. Listening for multicasts can be controlled by General/MulticastRecvNetworkInterfaceAddresses.</p>
<p>The special value "default" maps on spdp if the network is a WiFi network, on true if it is a wired network</p>
<p>The default value is: <code>default</code></p></xs:documentation>
</xs:annotation>
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:pattern value="default|((false|spdp|asm|ssm|true|default)(,(false|spdp|asm|ssm|true|default))*)"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="DontRoute" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>This element allows setting the SO_DONTROUTE option for outgoing packets to bypass the local routing tables. This is generally useful only when the routing tables cannot be trusted, which is highly unusual.</p>
<p>The default value is: <code>false</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="EnableMulticastLoopback" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>This element specifies whether Cyclone DDS allows IP multicast packets to be visible to all DDSI participants in the same node, including itself. It must be "true" for intra-node multicast communications. However, if a node runs only a single Cyclone DDS service and does not host any other DDSI-capable programs, it should be set to "false" for improved performance.</p>
<p>The default value is: <code>true</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="EntityAutoNaming">
<xs:annotation>
<xs:documentation>
<p>This element specifies the entity autonaming mode. By default set to 'empty' which means no name will be set (but you can still use dds_qset_entity_name). When set to 'fancy' participants, publishers, subscribers, writers, and readers will get randomly generated names. An autonamed entity will share a 3-letter prefix with their parent entity.</p>
<p>The default value is: <code>empty</code></p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:simpleContent>
<xs:restriction base="xs:anyType">
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="empty"/>
<xs:enumeration value="fancy"/>
</xs:restriction>
</xs:simpleType>
<xs:attribute name="seed">
<xs:annotation>
<xs:documentation>
<p>Provide an initial seed for the entity naming. Your string will be hashed to provide the random state. When provided, the same sequence of names is generated every run. Creating your entities in the same order will ensure they are the same between runs. If you run multiple nodes, set this via environment variable to ensure every node generates unique names. A random starting seed is chosen when left empty, (the default). </p>
<p>The default value is: <code>&lt;empty&gt;</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:restriction>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name="ExternalNetworkAddress" type="xs:string">
<xs:annotation>
<xs:documentation>
<p>This element allows explicitly overruling the network address Cyclone DDS advertises in the discovery protocol, which by default is the address of the preferred network interface (General/NetworkInterfaceAddress), to allow Cyclone DDS to communicate across a Network Address Translation (NAT) device.</p>
<p>The default value is: <code>auto</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="ExternalNetworkMask" type="xs:string">
<xs:annotation>
<xs:documentation>
<p>This element specifies the network mask of the external network address. This element is relevant only when an external network address (General/ExternalNetworkAddress) is explicitly configured. In this case locators received via the discovery protocol that are within the same external subnet (as defined by this mask) will be translated to an internal address by replacing the network portion of the external address with the corresponding portion of the preferred network interface address. This option is IPv4-only.</p>
<p>The default value is: <code>0.0.0.0</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="FragmentSize" type="config:memsize">
<xs:annotation>
<xs:documentation>
<p>This element specifies the size of DDSI sample fragments generated by Cyclone DDS. Samples larger than FragmentSize are fragmented into fragments of FragmentSize bytes each, except the last one, which may be smaller. The DDSI spec mandates a minimum fragment size of 1025 bytes, but Cyclone DDS will do whatever size is requested, accepting fragments of which the size is at least the minimum of 1025 and FragmentSize.</p>
<p>The unit must be specified explicitly. Recognised units: B (bytes), kB & KiB (2<sup>10</sup> bytes), MB & MiB (2<sup>20</sup> bytes), GB & GiB (2<sup>30</sup> bytes).</p>
<p>The default value is: <code>1344 B</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="Interfaces">
<xs:annotation>
<xs:documentation>
<p>This element specifies the network interfaces for use by Cyclone DDS. Multiple interfaces can be specified with an assigned priority. The list in use will be sorted by priority. If interfaces have an equal priority, the specification order will be preserved.</p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element ref="config:NetworkInterface"/>
<xs:element ref="config:PubSubMessageExchange"/>
</xs:choice>
</xs:complexType>
</xs:element>
<xs:element name="NetworkInterface">
<xs:annotation>
<xs:documentation>
<p>This element defines a network interface. You can set autodetermine="true" to autoselect the interface CycloneDDS considers the highest quality. If autodetermine="false" (the default), you must specify the name and/or address attribute. If you specify both, they must match the same interface.</p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:attribute name="address">
<xs:annotation>
<xs:documentation>
<p>This attribute specifies the address of the interface. With ipv4 allows matching on the network part if the host part is set to zero. </p>
<p>The default value is: <code>&lt;empty&gt;</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="allow_multicast" type="xs:(null)">
<xs:annotation>
<xs:documentation>
<p>This element controls whether Cyclone DDS uses multicasts for data traffic on this interface.</p>
<p>It is a comma-separated list of some of the following keywords: "spdp", "asm", "ssm", or either of "false" or "true", or "default".</p>
<ul>
<li><i>spdp</i>: enables the use of ASM (any-source multicast) for participant discovery, joining the multicast group on the discovery socket, transmitting SPDP messages to this group, but never advertising nor using any multicast address in any discovery message, thus forcing unicast communications for all endpoint discovery and user data.</li>
<li><i>asm</i>: enables the use of ASM for all traffic, including receiving SPDP but not transmitting SPDP messages via multicast</li>
<li><i>ssm</i>: enables the use of SSM (source-specific multicast) for all non-SPDP traffic (if supported)</li></ul>
<p>When set to "false" all multicasting is disabled; "true"enables the full use of multicasts. Listening for multicasts can be controlled by General/MulticastRecvNetworkInterfaceAddresses.</p>
<p>The special value "default" takes the value from the globalGeneral/AllowMulticast setting.</p>
<p>The default value is: <code>default</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="autodetermine">
<xs:annotation>
<xs:documentation>
<p>If set to "true" an interface is automatically selected. Specifying a name or an address when automatic is set is considered an error.</p>
<p>The default value is: <code>false</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="multicast">
<xs:annotation>
<xs:documentation>
<p>This attribute specifies whether the interface should use multicast. On its default setting, 'default', it will use the value as return by the operating system. If set to 'true', the interface will be assumed to be multicast capable even when the interface flags returned by the operating system state it is not (this provides a workaround for some platforms). If set to 'false', the interface will never be used for multicast.</p>
<p>The default value is: <code>default</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="name">
<xs:annotation>
<xs:documentation>
<p>This attribute specifies the name of the interface. </p>
<p>The default value is: <code>&lt;empty&gt;</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="prefer_multicast" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>When false (default), Cyclone DDS uses unicast for data whenever a single unicast suffices. Setting this to true makes it prefer multicasting data, falling back to unicast only when no multicast is available.</p>
<p>The default value is: <code>false</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="presence_required" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>By default, all specified network interfaces must be present; if they are missing Cyclone will not start. By explicitly setting this setting for an interface, you can instruct Cyclone to ignore that interface if it is not present.</p>
<p>The default value is: <code>true</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="priority">
<xs:annotation>
<xs:documentation>
<p>This attribute specifies the interface priority (decimal integer or <i>default</i>). The default value for loopback interfaces is 2, for all other interfaces it is 0.</p>
<p>The default value is: <code>default</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:complexType>
</xs:element>
<xs:element name="PubSubMessageExchange">
<xs:annotation>
<xs:documentation>
<p>This element defines a PSMX.</p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:attribute name="config">
<xs:annotation>
<xs:documentation>
<p>This attribute specifies any configuration data for the PSMX instance.This has no meaning in CycloneDDS itself, and its parsing is deferred to thePSMX implementation.</p>
<p>The default value is: <code>&lt;empty&gt;</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="library">
<xs:annotation>
<xs:documentation>
<p>This attribute specifies the filename of the interface library. </p>
<p>The default value is: <code>&lt;empty&gt;</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="name">
<xs:annotation>
<xs:documentation>
<p>This attribute specifies the name of the interface. </p>
<p>The default value is: <code>&lt;empty&gt;</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="priority">
<xs:annotation>
<xs:documentation>
<p>This attribute specifies the interface priority (decimal integer or <i>default</i>). The default value for a PSMX is 0.</p>
<p>The default value is: <code>default</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:complexType>
</xs:element>
<xs:element name="MaxMessageSize" type="config:memsize">
<xs:annotation>
<xs:documentation>
<p>This element specifies the maximum size of the UDP payload that Cyclone DDS will generate. Cyclone DDS will try to maintain this limit within the bounds of the DDSI specification, which means that in some cases (especially for very low values of MaxMessageSize) larger payloads may sporadically be observed (currently up to 1192 B).</p>
<p>On some networks it may be necessary to set this item to keep the packetsize below the MTU to prevent IP fragmentation.</p>
<p>The unit must be specified explicitly. Recognised units: B (bytes), kB & KiB (2<sup>10</sup> bytes), MB & MiB (2<sup>20</sup> bytes), GB & GiB (2<sup>30</sup> bytes).</p>
<p>The default value is: <code>14720 B</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MaxRexmitMessageSize" type="config:memsize">
<xs:annotation>
<xs:documentation>
<p>This element specifies the maximum size of the UDP payload that Cyclone DDS will generate for a retransmit. Cyclone DDS will try to maintain this limit within the bounds of the DDSI specification, which means that in some cases (especially for very low values) larger payloads may sporadically be observed (currently up to 1192 B).</p>
<p>On some networks it may be necessary to set this item to keep the packetsize below the MTU to prevent IP fragmentation.</p>
<p>The unit must be specified explicitly. Recognised units: B (bytes), kB & KiB (2<sup>10</sup> bytes), MB & MiB (2<sup>20</sup> bytes), GB & GiB (2<sup>30</sup> bytes).</p>
<p>The default value is: <code>1456 B</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MulticastRecvNetworkInterfaceAddresses" type="xs:string">
<xs:annotation>
<xs:documentation>
<p>This element specifies which network interfaces Cyclone DDS listens to multicasts. The following options are available:</p>
<ul>
<li><i>all</i>: listen for multicasts on all multicast-capable interfaces; or</li>
<li><i>any</i>: listen for multicasts on the operating system default interface; or</li>
<li><i>preferred</i>: listen for multicasts on the preferred interface (General/Interface/NetworkInterface with the highest priority); or</li>
<li><i>none</i>: does not listen for multicasts on any interface; or</li>
<li>a comma-separated list of network addresses: configures Cyclone DDS to listen for multicasts on all listed addresses.</li>
</ul>
<p>If Cyclone DDS is in IPv6 mode and the address of the preferred network interface is a link-local address, "all" is treated as a synonym for "preferred" and a comma-separated list is treated as "preferred" if it contains the preferred interface and as "none" if not.</p>
<p>The default value is: <code>preferred</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MulticastTimeToLive" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element specifies the time-to-live setting for outgoing multicast packets.</p>
<p>The default value is: <code>32</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="RedundantNetworking" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>When enabled, use selected network interfaces in parallel for redundancy.</p>
<p>The default value is: <code>false</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="Transport">
<xs:annotation>
<xs:documentation>
<p>This element allows selecting the transport to be used (udp, udp6, tcp, tcp6, raweth)</p>
<p>The default value is: <code>default</code></p></xs:documentation>
</xs:annotation>
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="default"/>
<xs:enumeration value="udp"/>
<xs:enumeration value="udp6"/>
<xs:enumeration value="tcp"/>
<xs:enumeration value="tcp6"/>
<xs:enumeration value="raweth"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="UseIPv6">
<xs:annotation>
<xs:documentation>
<p>Deprecated (use Transport instead)</p>
<p>The default value is: <code>default</code></p></xs:documentation>
</xs:annotation>
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="false"/>
<xs:enumeration value="true"/>
<xs:enumeration value="default"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Internal">
<xs:annotation>
<xs:documentation>
<p>The Internal elements deal with a variety of settings that are evolving and that are not necessarily fully supported. For the majority of the Internal settings the functionality is supported, but the right to change the way the options control the functionality is reserved. This includes renaming or moving options.</p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:all>
<xs:element minOccurs="0" ref="config:AccelerateRexmitBlockSize"/>
<xs:element minOccurs="0" ref="config:AckDelay"/>
<xs:element minOccurs="0" ref="config:AutoReschedNackDelay"/>
<xs:element minOccurs="0" ref="config:BuiltinEndpointSet"/>
<xs:element minOccurs="0" ref="config:BurstSize"/>
<xs:element minOccurs="0" ref="config:ControlTopic"/>
<xs:element minOccurs="0" ref="config:DefragReliableMaxSamples"/>
<xs:element minOccurs="0" ref="config:DefragUnreliableMaxSamples"/>
<xs:element minOccurs="0" ref="config:DeliveryQueueMaxSamples"/>
<xs:element minOccurs="0" ref="config:EnableExpensiveChecks"/>
<xs:element minOccurs="0" ref="config:ExtendedPacketInfo"/>
<xs:element minOccurs="0" ref="config:GenerateKeyhash"/>
<xs:element minOccurs="0" ref="config:HeartbeatInterval"/>
<xs:element minOccurs="0" ref="config:LateAckMode"/>
<xs:element minOccurs="0" ref="config:LivelinessMonitoring"/>
<xs:element minOccurs="0" ref="config:MaxParticipants"/>
<xs:element minOccurs="0" ref="config:MaxQueuedRexmitBytes"/>
<xs:element minOccurs="0" ref="config:MaxQueuedRexmitMessages"/>
<xs:element minOccurs="0" ref="config:MaxSampleSize"/>
<xs:element minOccurs="0" ref="config:MeasureHbToAckLatency"/>
<xs:element minOccurs="0" ref="config:MonitorPort"/>
<xs:element minOccurs="0" ref="config:MultipleReceiveThreads"/>
<xs:element minOccurs="0" ref="config:NackDelay"/>
<xs:element minOccurs="0" ref="config:PreEmptiveAckDelay"/>
<xs:element minOccurs="0" ref="config:PrimaryReorderMaxSamples"/>
<xs:element minOccurs="0" ref="config:PrioritizeRetransmit"/>
<xs:element minOccurs="0" ref="config:RediscoveryBlacklistDuration"/>
<xs:element minOccurs="0" ref="config:RetransmitMerging"/>
<xs:element minOccurs="0" ref="config:RetransmitMergingPeriod"/>
<xs:element minOccurs="0" ref="config:RetryOnRejectBestEffort"/>
<xs:element minOccurs="0" ref="config:SPDPResponseMaxDelay"/>
<xs:element minOccurs="0" ref="config:SecondaryReorderMaxSamples"/>
<xs:element minOccurs="0" ref="config:SocketReceiveBufferSize"/>
<xs:element minOccurs="0" ref="config:SocketSendBufferSize"/>
<xs:element minOccurs="0" ref="config:SquashParticipants"/>
<xs:element minOccurs="0" ref="config:SynchronousDeliveryLatencyBound"/>
<xs:element minOccurs="0" ref="config:SynchronousDeliveryPriorityThreshold"/>
<xs:element minOccurs="0" ref="config:Test"/>
<xs:element minOccurs="0" ref="config:UseMulticastIfMreqn"/>
<xs:element minOccurs="0" ref="config:Watermarks"/>
<xs:element minOccurs="0" ref="config:WriterLingerDuration"/>
</xs:all>
</xs:complexType>
</xs:element>
<xs:element name="AccelerateRexmitBlockSize" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>Proxy readers that are assumed to still be retrieving historical data get this many samples retransmitted when they NACK something, even if some of these samples have sequence numbers outside the set covered by the NACK.</p>
<p>The default value is: <code>0</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="AckDelay" type="config:duration">
<xs:annotation>
<xs:documentation>
<p>This setting controls the delay between sending identical acknowledgements.</p>
<p>The unit must be specified explicitly. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>10 ms</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="AutoReschedNackDelay" type="config:duration_inf">
<xs:annotation>
<xs:documentation>
<p>This setting controls the interval with which a reader will continue NACK'ing missing samples in the absence of a response from the writer, as a protection mechanism against writers incorrectly stopping the sending of HEARTBEAT messages.</p>
<p>Valid values are finite durations with an explicit unit or the keyword 'inf' for infinity. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>3 s</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="BuiltinEndpointSet">
<xs:annotation>
<xs:documentation>
<p>This element controls which participants will have which built-in endpoints for the discovery and liveliness protocols. Valid values are:</p>
<ul><li><i>full</i>: all participants have all endpoints;</li>
<li><i>writers</i>: all participants have the writers, but just one has the readers;</li>
<li><i>minimal</i>: only one participant has built-in endpoints.</li></ul>
<p>The default is <i>writers</i>, as this is thought to be compliant and reasonably efficient. <i>Minimal</i> may or may not be compliant but is most efficient, and <i>full</i> is inefficient but certain to be compliant.</p>
<p>The default value is: <code>writers</code></p></xs:documentation>
</xs:annotation>
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="full"/>
<xs:enumeration value="writers"/>
<xs:enumeration value="minimal"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="BurstSize">
<xs:annotation>
<xs:documentation>
<p>Setting for controlling the size of transmitting bursts.</p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:all>
<xs:element minOccurs="0" ref="config:MaxFragsRexmitSample"/>
<xs:element minOccurs="0" ref="config:MaxInitTransmit"/>
<xs:element minOccurs="0" ref="config:MaxRexmit"/>
</xs:all>
</xs:complexType>
</xs:element>
<xs:element name="MaxFragsRexmitSample" type="xs:string">
<xs:annotation>
<xs:documentation>
<p>This element controls the maximum number of fragments of a sample that are retransmit in response to a NACK of the entire sample (as opposed to what is sent in response to a NACKFRAG requesting specific fragments).</p>
<p>The default value is: <code>1</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MaxInitTransmit" type="config:memsize">
<xs:annotation>
<xs:documentation>
<p>This element specifies how much more than the (presumed or discovered) receive buffer size may be sent when transmitting a sample for the first time, expressed as a percentage; the remainder will then be handled via retransmits. Usually, the receivers can keep up with the transmitter, at least on average, so generally it is better to hope for the best and recover. Besides, the retransmits will be unicast, and so any multicast advantage will be lost as well.</p>
<p>The unit must be specified explicitly. Recognised units: B (bytes), kB & KiB (2<sup>10</sup> bytes), MB & MiB (2<sup>20</sup> bytes), GB & GiB (2<sup>30</sup> bytes).</p>
<p>The default value is: <code>4294967295</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MaxRexmit" type="config:memsize">
<xs:annotation>
<xs:documentation>
<p>This element specifies the amount of data to be retransmitted in response to one NACK.</p>
<p>The unit must be specified explicitly. Recognised units: B (bytes), kB & KiB (2<sup>10</sup> bytes), MB & MiB (2<sup>20</sup> bytes), GB & GiB (2<sup>30</sup> bytes).</p>
<p>The default value is: <code>1 MiB</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="ControlTopic">
<xs:annotation>
<xs:documentation>
<p>The ControlTopic element allows configured whether Cyclone DDS provides a special control interface via a predefined topic or not.<p></xs:documentation>
</xs:annotation>
<xs:complexType/>
</xs:element>
<xs:element name="DefragReliableMaxSamples" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element sets the maximum number of samples that can be defragmented simultaneously for a reliable writer. This has to be large enough to handle retransmissions of historical data in addition to new samples.</p>
<p>The default value is: <code>16</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="DefragUnreliableMaxSamples" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element sets the maximum number of samples that can be defragmented simultaneously for best-effort writers.</p>
<p>The default value is: <code>4</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="DeliveryQueueMaxSamples" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element controls the maximum size of a delivery queue, expressed in samples. Once a delivery queue is full, incoming samples destined for that queue are dropped until space becomes available again.</p>
<p>The default value is: <code>256</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="EnableExpensiveChecks">
<xs:annotation>
<xs:documentation>
<p>This element enables expensive checks in builds with assertions enabled and is ignored otherwise. Recognised categories are:</p>
<ul>
<li><i>whc</i>: writer history cache checking</li>
<li><i>rhc</i>: reader history cache checking</li>
<li><i>xevent</i>: xevent checking</li>
<p>In addition, there is the keyword <i>all</i> that enables all checks.</p>
<p>The default value is: <code>&lt;empty&gt;</code></p></xs:documentation>
</xs:annotation>
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:pattern value="((whc|rhc|xevent|all)(,(whc|rhc|xevent|all))*)|"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="ExtendedPacketInfo" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>Whether to enable the IP_PKTINFO on UDP sockets to get hold of the packet destination address and interface on which it was received. This allows for better filtering on discovery packets, but comes at a small performance penalty.</p>
<p>The default value is: <code>true</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="GenerateKeyhash" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>When true, include keyhashes in outgoing data for topics with keys.</p>
<p>The default value is: <code>false</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="HeartbeatInterval">
<xs:annotation>
<xs:documentation>
<p>This element allows configuring the base interval for sending writer heartbeats and the bounds within which it can vary.</p>
<p>Valid values are finite durations with an explicit unit or the keyword 'inf' for infinity. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>100 ms</code></p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:simpleContent>
<xs:extension base="config:duration_inf">
<xs:attribute name="max" type="config:duration_inf">
<xs:annotation>
<xs:documentation>
<p>This attribute sets the maximum interval for periodic heartbeats.</p>
<p>Valid values are finite durations with an explicit unit or the keyword 'inf' for infinity. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>8 s</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="min" type="config:duration_inf">
<xs:annotation>
<xs:documentation>
<p>This attribute sets the minimum interval that must have passed since the most recent heartbeat from a writer, before another asynchronous (not directly related to writing) will be sent.</p>
<p>Valid values are finite durations with an explicit unit or the keyword 'inf' for infinity. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>5 ms</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="minsched" type="config:duration_inf">
<xs:annotation>
<xs:documentation>
<p>This attribute sets the minimum interval for periodic heartbeats. Other events may still cause heartbeats to go out.</p>
<p>Valid values are finite durations with an explicit unit or the keyword 'inf' for infinity. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>20 ms</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name="LateAckMode" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>Ack a sample only when it has been delivered, instead of when committed to delivering it.</p>
<p>The default value is: <code>false</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="LivelinessMonitoring">
<xs:annotation>
<xs:documentation>
<p>This element controls whether or not implementation should internally monitor its own liveliness. If liveliness monitoring is enabled, stack traces can be dumped automatically when some thread appears to have stopped making progress.</p>
<p>The default value is: <code>false</code></p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:simpleContent>
<xs:extension base="xs:boolean">
<xs:attribute name="Interval" type="config:duration">
<xs:annotation>
<xs:documentation>
<p>This element controls the interval to check whether threads have been making progress.</p>
<p>The unit must be specified explicitly. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>1s</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="StackTraces" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>This element controls whether or not to write stack traces to the DDSI2 trace when a thread fails to make progress (on select platforms only).</p>
<p>The default value is: <code>true</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name="MaxParticipants" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This elements configures the maximum number of DCPS domain participants this Cyclone DDS instance is willing to service. 0 is unlimited.</p>
<p>The default value is: <code>0</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MaxQueuedRexmitBytes" type="config:memsize">
<xs:annotation>
<xs:documentation>
<p>This setting limits the maximum number of bytes queued for retransmission. The default value of 0 is unlimited unless an AuxiliaryBandwidthLimit has been set, in which case it becomes NackDelay * AuxiliaryBandwidthLimit. It must be large enough to contain the largest sample that may need to be retransmitted.</p>
<p>The unit must be specified explicitly. Recognised units: B (bytes), kB & KiB (2<sup>10</sup> bytes), MB & MiB (2<sup>20</sup> bytes), GB & GiB (2<sup>30</sup> bytes).</p>
<p>The default value is: <code>512 kB</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MaxQueuedRexmitMessages" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This setting limits the maximum number of samples queued for retransmission.</p>
<p>The default value is: <code>200</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MaxSampleSize" type="config:memsize">
<xs:annotation>
<xs:documentation>
<p>This setting controls the maximum (CDR) serialised size of samples that Cyclone DDS will forward in either direction. Samples larger than this are discarded with a warning.</p>
<p>The unit must be specified explicitly. Recognised units: B (bytes), kB & KiB (2<sup>10</sup> bytes), MB & MiB (2<sup>20</sup> bytes), GB & GiB (2<sup>30</sup> bytes).</p>
<p>The default value is: <code>2147483647 B</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MeasureHbToAckLatency" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>This element enables heartbeat-to-ack latency among Cyclone DDS services by prepending timestamps to Heartbeat and AckNack messages and calculating round trip times. This is non-standard behaviour. The measured latencies are quite noisy and are currently not used anywhere.</p>
<p>The default value is: <code>false</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MonitorPort" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element allows configuring a service that dumps a text description of part the internal state to TCP clients. By default (-1), this is disabled; specifying 0 means a kernel-allocated port is used; a positive number is used as the TCP port number.</p>
<p>The default value is: <code>-1</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="MultipleReceiveThreads">
<xs:annotation>
<xs:documentation>
<p>This element controls whether all traffic is handled by a single receive thread (false) or whether multiple receive threads may be used to improve latency (true). The value "default" currently maps to false because of firewalls potentially blocking the packets it sends to itself to interrupt the blocking reads during termination.</p><p>Currently multiple receive threads are only used for connectionless transport (e.g., UDP) and ManySocketsMode not set to single (the default).</p>
<p>The default value is: <code>default</code></p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:simpleContent>
<xs:restriction base="xs:anyType">
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="false"/>
<xs:enumeration value="true"/>
<xs:enumeration value="default"/>
</xs:restriction>
</xs:simpleType>
<xs:attribute name="maxretries" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>Receive threads dedicated to a single socket can only be triggered for termination by sending a packet. Reception of any packet will do, so termination failure due to packet loss is exceedingly unlikely, but to eliminate all risks, it will retry as many times as specified by this attribute before aborting.</p>
<p>The default value is: <code>4294967295</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:restriction>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name="NackDelay" type="config:duration">
<xs:annotation>
<xs:documentation>
<p>This setting controls the delay between receipt of a HEARTBEAT indicating missing samples and a NACK (ignored when the HEARTBEAT requires an answer). However, no NACK is sent if a NACK had been scheduled already for a response earlier than the delay requests: then that NACK will incorporate the latest information.</p>
<p>The unit must be specified explicitly. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>100 ms</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="PreEmptiveAckDelay" type="config:duration">
<xs:annotation>
<xs:documentation>
<p>This setting controls the delay between the discovering a remote writer and sending a pre-emptive AckNack to discover the available range of data.</p>
<p>The unit must be specified explicitly. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>10 ms</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="PrimaryReorderMaxSamples" type="xs:integer">
<xs:annotation>
<xs:documentation>
<p>This element sets the maximum size in samples of a primary re-order administration. Each proxy writer has one primary re-order administration to buffer the packet flow in case some packets arrive out of order. Old samples are forwarded to secondary re-order administrations associated with readers needing historical data.</p>
<p>The default value is: <code>128</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="PrioritizeRetransmit" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>This element controls whether retransmits are prioritized over new data, speeding up recovery.</p>
<p>The default value is: <code>true</code></p></xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="RediscoveryBlacklistDuration">
<xs:annotation>
<xs:documentation>
<p>This element controls for how long a remote participant that was previously deleted will remain on a blacklist to prevent rediscovery, giving the software on a node time to perform any cleanup actions it needs to do. To some extent this delay is required internally by Cyclone DDS, but in the default configuration with the 'enforce' attribute set to false, Cyclone DDS will reallow rediscovery as soon as it has cleared its internal administration. Setting it to too small a value may result in the entry being pruned from the blacklist before Cyclone DDS is ready, it is therefore recommended to set it to at least several seconds.</p>
<p>Valid values are finite durations with an explicit unit or the keyword 'inf' for infinity. Recognised units: ns, us, ms, s, min, hr, day.</p>
<p>The default value is: <code>0s</code></p></xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:simpleContent>
<xs:extension base="config:duration_inf">
<xs:attribute name="enforce" type="xs:boolean">
<xs:annotation>
<xs:documentation>
<p>This attribute controls whether the configured time during which recently deleted participants will not be rediscovered (i.e., "black listed") is enforced and following complete removal of the participant in Cyclone DDS, or whether it can be rediscovered earlier provided all traces of that participant have been removed already.</p>
<p>The default value is: <code>false</code></p></xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name="RetransmitMerging">
<xs:annotation>
<xs:documentation>
<p>This elements controls the addressing and timing of retransmits. Possible values are:</p>
<ul><li><i>never</i>: retransmit only to the NACK-ing reader;</li>
<li><i>adaptive</i>: attempt to combine retransmits needed for reliability, but send historical (transient-local) data to the requesting reader only;</li>
<li><i>always</i>: do not distinguish between different causes, always try to merge.</li></ul>
<p>The default is <i>never</i>. See also Internal/RetransmitMergingPeriod.</p>
<p>The default value is: <code>never</code></p></xs:documentation>
</xs:annotation>