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Update 4.storage-service.md #949

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Sep 13, 2021
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Update 4.storage-service.md #949

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2 changes: 1 addition & 1 deletion docs-2.0/1.introduction/3.nebula-graph-architecture/4.storage-service.md
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Expand Up @@ -98,7 +98,7 @@ Nebula Graph使用自行开发的KVStore，而不是其他开源KVStore，原因
|`VertexID`|点ID。前一个`VertexID`在出边里表示起始点ID，在"入边"里表示目的点ID；后一个`VertexID`"出边"里表示目的点ID，在"入边"里表示起始点ID。|
|`Edge type`|边的类型。大于0表示"出边"，小于0表示"入边"。长度为4个字节。|
|`Rank`|用来处理两点之间有多个同类型边的情况。用户可以根据自己的需求进行设置，例如存放交易时间、交易流水号等。长度为8个字节，|
|`PlaceHolder`|占位符，预留给TOSS（Transaction On Storage Side）功能使用。长度为1个字节。|
|`PlaceHolder`|占位符，预留。|

!!! compatibility "历史版本兼容性"

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