Hello.
Thank you for making suggestions; the problem is handling large files, can
you please suggest any efficient way to transform TTL to N-triple file?
On Monday, October 23, 2023 at 2:14:14 AM UTC+2 ni...@kurrawong.net wrote:
> Turtle files have structure to them that a line-by-line sampler such as
> grep will break. It's not just about the prefixes but other parts in the
> Turtle files too since many lines only make sense in groups of lines.
>
> If you want to sample an RDF file line-by-line, you need to serialise the
> file into N-Triples and then filter that, using some mechanism.
>
> With a samples N-Triples file, you can then convert back to Turtle. to
> preserve the original prefixes, you can re-add them to the graph when
> serialising using g.bind("prefix", Namespace("namespace")) for each one.
>
> Regards, Nick
>
>
> ------- Original Message -------
>
> On Monday, October 23rd, 2023 at 9:07 AM, Abhay Kujur <agpku...@gmail.com>
> wrote:
>
> Hello,
>
> I am working on a large ttl file of 20 GB, I try to read in using rdflib
> but the I am getting a error
> killed
>
> I am trying to create a smaller file from this file using grep command.
>
> The sample data is yagoTransitiveType.ttl
> <https://resources.mpi-inf.mpg.de/yago-naga/yago3.1/yagoTransitiveType.txt>
> grep "wordnet_" yagoTransitiveType.ttl >wordnet_yagoTransitiveType.ttl
>
> The problem is that the file don't read the initial prefix like yago: and
> other, due to which rdflib is not able to parse the ttl file.
> import rdflib
> g = rdflib.Graph()
> g.parse('yagoTransitiveType.ttl', format='ttl')
>
> How can I fix the issue either by adding 10 lines after running grep
> command or any other way?
>
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>
>
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