Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1263#discussion_r42366708
--- Diff: docs/libs/gelly_guide.md ---
@@ -424,8 +448,8 @@ graph.subgraph((vertex => vertex.getValue > 0), (edge
=> edge.getValue < 0))
<img alt="Filter Transformations" width="80%"
src="fig/gelly-filter.png"/>
</p>
-* <strong>Join</strong>: Gelly provides specialized methods for joining
the vertex and edge datasets with other input datasets. `joinWithVertices`
joins the vertices with a `Tuple2` input data set. The join is performed using
the vertex ID and the first field of the `Tuple2` input as the join keys. The
method returns a new `Graph` where the vertex values have been updated
according to a provided user-defined map function.
-Similarly, an input dataset can be joined with the edges, using one of
three methods. `joinWithEdges` expects an input `DataSet` of `Tuple3` and joins
on the composite key of both source and target vertex IDs.
`joinWithEdgesOnSource` expects a `DataSet` of `Tuple2` and joins on the source
key of the edges and the first attribute of the input dataset and
`joinWithEdgesOnTarget` expects a `DataSet` of `Tuple2` and joins on the target
key of the edges and the first attribute of the input dataset. All three
methods apply a map function on the edge and the input data set values.
+* <strong>Join</strong>: Gelly provides specialized methods for joining
the vertex and edge datasets with other input datasets. `joinWithVertices`
joins the vertices with a `Tuple2` input data set. The join is performed using
the vertex ID and the first field of the `Tuple2` input as the join keys. The
method returns a new `Graph` where the vertex values have been updated
according to a provided user-defined tranformation function.
--- End diff --
tranSformation function.
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