Re: [igraph] Namespaces and GraphML

[Tamas Nepusz]

Hello Robin,

I was checking the GraphML file that you sent and I was wondering whether it is 
indeed a valid GraphML file - after all, the root tag is simply <graphml> and 
not <ns3:graphml> so it is not in the GraphML namespace. The GraphML primer 
states that the root tag is also in the GraphML namespace [1]:

"The second line contains the root-element element of a GraphML document: the 
graphml element. The graphml element, like all other GraphML elements, belongs 
to the namespace http://graphml.graphdrawing.org/xmlns.”

[1] http://graphml.graphdrawing.org/primer/graphml-primer.html 

--  
T.

On 23 September 2014 at 15:12:33, Robin Müller-Bady (address@hidden) wrote:
> Hi there,
>  
> I am using igraph in order to read, process and write graphml files of
> graphml version 1.1 (http://graphml.graphdrawing.org/xmlns/1.1/graphml.xsd).  
> I get the graphml files from a java generator and postpress them with
> the igraph python interface.
> The problem is, that the java graphml generator creates specific
> namespaces in the files, e.g.
> "xmlns:ns2="http://www.w3.org/1999/xlink"; " such that it results in a
> file that looks like follows:
>  
>  
> > xmlns:ns3="http://graphml.graphdrawing.org/xmlns";>
>  
>  
>  
>  
>  
>  
>  
>  
>  
> which is not readable by igraph anymore ("igraph._igraph.InternalError:
> Error at foreign-graphml.c:1139: Graph index was too large, Invalid value").
>  
> I am currently using Debian Jessie with igraph 0.7.0 and Python 2.7.8.
>  
> You have any ideas on how to fix that without processing the file
> through awk/sed?
>  
> Regards,
>  
> Robin
>  
>  
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