Gephi also exports GEXF in 1.3 version formats (or at least has a version="1.3" attribute). The below is the header from a Gephi 0.9.2 export in GEXF:

<?xml version="1.0" encoding="UTF-8"?>
<gexf xmlns="http://www.gexf.net/1.3" version="1.3" xmlns:viz="http://www.gexf.net/1.3/viz" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.gexf.net/1.3 http://www.gexf.net/1.3/gexf.xsd">

Since there's no XSD online or published 1.3 documentation, support libraries may not parse these files. For instance, Gephi-generated GEXF can't be imported into the popular python graph analysis tool networkx as networkx only supports GEXF version 1.1 and 1.2.

The wiki says that version 1.3 is a work in progress.

The original v1.3 issue chain is at #1152

Is there a way to export in the older GEXF format without going to an earlier version of Gephi?

I'm having the problem of gephi defaulting to the WIP gexf 1.3 by default. I would like to have the option for 1.2 so that my old tools (e.g. networkx) can still read them. Furthermore, it seems a little strange to use the WIP, undocumented format, where the schema links to a 404 be even an option at all without due warning...

Closing this issue as it has been resolved via gephi/gexf#13

All GEXF 1.3 specifications have been published and are accessible online.