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Triple File Reader

StreamableKNIME Semantic Web Nodes version 4.1.0.v201911110939 by KNIME AG, Zurich, Switzerland

This node reads triples stored in a file into a Data Table. It supports files such as *.ttl, *.rdf. *.rj, *.nt, *.trig, *.trix. Please check Jena Documentation for further information.

The N-Triples format for the query result is necessary to be kept if you want to insert the triples in an endstore. This is especially imporant for (typed) literals. If the N-Triples format is not preserved type information will get lost (a String representation of the literal is returned). For URIs the angled brackets are not preserved, which are necessary for insertion. Here is an example showing triples with and without format preservation:

Preservesub pred object
Yes<http://expl.org/expl><http://expl.org/integer>4
Nohttp://expl.org/explhttp://expl.org/integer4
Yes<http://expl.org/expl><http://expl.org/string>"4"
Nohttp://expl.org/explhttp://expl.org/string4
Yes<http://expl.org/expl><http://expl.org/string>"sometstring"@en
Nohttp://expl.org/explhttp://expl.org/stringsometstring
Yes<http://expl.org/expl><http://expl.org/own>"123k"^^<http://expl.org/owntype>
Nohttp://expl.org/explhttp://expl.org/own123k


Functionality is provided using the Apache Jena Framework

Options

Selected File
Enter a valid file name or URL. You can also choose a previously selected location from the drop-down list, or select a local file from the "Browse..." dialog.
Preserve N-Triples format
Whether the N-Triples format should be preserved.

Output Ports

Buffered Data Table containing triples

Best Friends (Incoming)

Best Friends (Outgoing)

Workflows

Installation

To use this node in KNIME, install KNIME Semantic Web from the following update site:

KNIME 4.1
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Developers

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