Import GraphML to Neo4j: how to specify node labels?

Question

I want to import my GraphML data to Neo4j database (version 2.0.1). The question is, how can I specify Neo4j node label in GraphML?

I tried the following to no avail:

<!--This format is used when exporting Neo4j data to GraphML-->
<node id="1" labels=":PAGE">
    <data key="labels">:PAGE</data>
</node>

So, how should I format my XML so Neo4j could recognize node labels?

Sergey Kolodiy · Accepted Answer · 2014-04-06T20:24:39.820

4

Unfortunately, I was not able to find any documentation about the import behavior. So I invented a workaround.

I imported GraphML data set to Neo4j using the following node structure:

<node id="1">
    <!--This code doesn't really force Neo4j to create PAGE label-->
    <data key="label">PAGE</data>
</node>

Then I executed the following Cypher command:

MATCH (n)
WHERE n.label='PAGE'
SET n :PAGE

After that, Neo4j applied PAGE label to each node that matches the search condition.

At the moment, this workaround is acceptable for me. It would be better to find the real solution, though (if any).

edited Apr 06 '14 at 20:24

answered Apr 06 '14 at 18:41

Sergey Kolodiy

What tool did you use for the graphml import? Perhaps one can just add support there? – Michael Hunger Apr 06 '14 at 21:57
Can you raise a github issue there to handle labels with a suggestion? Then I can look into it. – Michael Hunger Apr 07 '14 at 17:10
you add it using this command: `MATCH (n) SET n:label RETURN n` – Sasa88 Feb 20 '17 at 11:24
You may also want to add `REMOVE n.label` to the end of your workaround's query to get rid of the unnecessary `label` property. – cybersam Nov 14 '19 at 21:12

score 2 · Answer 2 · answered Jun 13 '14 at 17:35

2

Node labels can be imported using the -t switch of the import-graphml command.

neo4j-sh (?)$ help import-graphml

[...]
-t   Import labels from labels node attribute and/or labels property.

answered Jun 13 '14 at 17:35

Dániel Stein

2 Answers2