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Update 4.schema.md #1809

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Dec 12, 2022
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Update 4.schema.md #1809

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8 changes: 8 additions & 0 deletions docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md
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Expand Up @@ -114,6 +114,10 @@ nebula> GO FROM "player100" OVER follow \
+-------------+-------------+
```

!!! note

The semantics of the query for the starting vertex with src(edge) and [properties(`$^`)](../5.operators/5.property-reference.md) are different. src(edge) indicates the starting vertex ID of the edge in the graph database, while properties(`$^`) indicates the data of the starting vertex where you start to expand the graph, such as the data of the starting vertex `player100` in the above GO statement.

### dst(edge)

dst(edge) returns the destination vertex ID of an edge.
Expand All @@ -135,6 +139,10 @@ nebula> GO FROM "player100" OVER follow \
+-------------+-------------+
```

!!! note

dst(edge) indicates the destination vertex ID of the edge in the graph database.

### rank(edge)

rank(edge) returns the rank value of an edge.
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