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Update 4.schema.md #1019

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Sep 28, 2021
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Update 4.schema.md #1019

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4 changes: 2 additions & 2 deletions docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md
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Expand Up @@ -9,8 +9,8 @@ Nebula Graph支持以下Schema函数。
|函数| 说明 |
|:---- | :----|
| id(vertex) | 返回点ID。数据类型和点ID的类型保持一致。|
|list tags(vertex) | 返回点的Tag。|
|list labels(vertex) | 返回点的Tag。|
|list tags(vertex) | 返回点的Tag，与labels()作用相同。|
|list labels(vertex) | 返回点的Tag，与tags()作用相同，用于兼容openCypher语法。|
|map properties(vertex_or_edge) | 接收点或边并返回其属性。|
|string type(edge) | 返回边的Edge type。|
|vertex startNode(path) | 获取一条边或一条路径并返回它的起始点ID。|
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