`GRAPH_COMMON_PROPERTIES (graphName, vertex1Example, vertex2Examples, options)`

The GRAPH\_COMMON\_PROPERTIES function returns a list of objects which have the id of
the vertices defined by *vertex1Example* as keys and a list of vertices defined by
*vertex21Example*, that share common properties as value. Notice that only the
vertex id and the matching attributes are returned in the result.

The complexity of this method is **O(n)** with *n* being the maximal amount of vertices
defined by the parameters vertexExamples.

*Parameters*

* *graphName*          : The name of the graph as a string.
* *vertex1Example*     : An example for the desired
vertices (see [example](#short-explanation-of-the-example-parameter)).
* *vertex2Example*     : An example for the desired
vertices (see [example](#short-explanation-of-the-example-parameter)).
* *options* (optional)    : An object containing the following options:
  * *vertex1CollectionRestriction* : One or multiple vertex
  collection names. Only vertices from these collections will be considered.
  * *vertex2CollectionRestriction*   : One or multiple vertex
  collection names. Only vertices from these collections will be considered.
  * *ignoreProperties* : One or multiple
 attributes of a document that should be ignored, either a string or an array..

@EXAMPLES

A route planner example, all locations with the same properties:

@EXAMPLE_ARANGOSH_OUTPUT{generalGraphProperties1}
  var examples = require("@arangodb/graph-examples/example-graph.js");
  var g = examples.loadGraph("routeplanner");
| db._query("FOR e IN GRAPH_COMMON_PROPERTIES("
| +"'routeplanner', {}, {}) RETURN e"
).toArray();
~ examples.dropGraph("routeplanner");
@END_EXAMPLE_ARANGOSH_OUTPUT

A route planner example, all cities which share same properties except for population.

@EXAMPLE_ARANGOSH_OUTPUT{generalGraphProperties2}
  var examples = require("@arangodb/graph-examples/example-graph.js");
  var g = examples.loadGraph("routeplanner");
| db._query("FOR e IN GRAPH_COMMON_PROPERTIES("
| +"'routeplanner', {}, {}, {ignoreProperties: 'population'}) RETURN e"
).toArray();
~ examples.dropGraph("routeplanner");
@END_EXAMPLE_ARANGOSH_OUTPUT