Heidi McClure created SOLR-12534:
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Summary: Add Edge Labels for Graph exports to GraphML to allow
imports to Gephi
Key: SOLR-12534
URL: https://issues.apache.org/jira/browse/SOLR-12534
Project: Solr
Issue Type: New Feature
Security Level: Public (Default Security Level. Issues are Public)
Components: Response Writers
Affects Versions: 7.4, 7.3.1, 7.3, 7.2.1, 7.2
Environment: Hello,
I am trying to export graph data from a Solr index (version 7.2) in a format
that can be imported to Gephi for visualization. I'm getting close! Is there a
way to add edge labels to the exports from this type of command (see curl
command that follows and sample outputs)?
Thanks in advance,
-heidi
Based on the examples found here:
[https://lucene.apache.org/solr/guide/7_2/graph-traversal.html] , this is
working in my GDELT-based data set query request:
curl --data-urlencode 'expr=nodes(gdelt_graph,
nodes(gdelt_graph,
walk="POLICE->Actor1Name_s",
trackTraversal="true",
gather="Actor2Name_s"),
walk="node->Actor1Name_s",
scatter="leaves,branches",
trackTraversal="true",
gather="Actor2Name_s")' [http://mymachine:8983/solr/gdelt_graph/graph]
Output is like this (just a subset):
<?xml version="1.0" encoding="UTF-8"?>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns
[http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd]";>
<graph id="G" edgedefault="directed">
<node id="POLICE">
<data key="field">node</data>
<data key="level">0</data>
</node>
<edge id="1" source="BANGLADESH" target="POLICE"/>
<node id="HOSPITAL">
<data key="field">Actor2Name_s</data>
<data key="level">1</data>
</node>
<edge id="2" source="POLICE" target="HOSPITAL"/>
<node id="UNITED STATES">
<data key="field">Actor2Name_s</data>
<data key="level">1</data>
</node>
<edge id="3" source="UNITED STATES" target="UNITED STATES"/>
<edge id="4" source="AFRICA" target="UNITED STATES"/>
<edge id="5" source="POLICE" target="UNITED STATES"/>
And I'd like to have a key for label and the data tag on the edges so that I
can get the Labels into Gephi. Does anyone know if this can be done? Below is
example of what I mean. Notice the key for label at the top of the file and the
"This is an edge description" entries on two of the edges (ids 1 and 2).
<?xml version="1.0" encoding="UTF-8"?>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns
[http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd]";>
<key id="label" for="edge" attr.name="label" attr.type="string"/>
<graph id="G" edgedefault="directed">
<node id="POLICE">
<data key="field">node</data>
<data key="level">0</data>
</node>
<edge id="1" source="BANGLADESH" target="POLICE" label="foo">
<data key="label">This is an edge description.</data>
</edge>
<node id="HOSPITAL">
<data key="field">Actor2Name_s</data>
<data key="level">1</data>
</node>
<edge id="2" source="POLICE" target="HOSPITAL">
<data key="label">This is an edge description.</data>
</edge>
<node id="UNITED STATES">
<data key="field">Actor2Name_s</data>
<data key="level">1</data>
</node>
<edge id="3" source="UNITED STATES" target="UNITED STATES"/>
<edge id="4" source="AFRICA" target="UNITED STATES"/>
<edge id="5" source="POLICE" target="UNITED STATES"/>
Reporter: Heidi McClure
Fix For: 7.5
Please add the ability to export edge labels to the GraphML export API.
In the environment section is the email I sent to solr-users where they
suggested adding an issue to request this capability be added - they also said
it would be an easy change to make. The change is minor and would possibly be
to this class:
org.apache.solr.response.GraphMLResponseWriter or might be an extension to that
class.
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