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:

Preserve	sub	pred	object
Yes	<http://expl.org/expl>	<http://expl.org/integer>	4
No	http://expl.org/expl	http://expl.org/integer	4
Yes	<http://expl.org/expl>	<http://expl.org/string>	"4"
No	http://expl.org/expl	http://expl.org/string	4
Yes	<http://expl.org/expl>	<http://expl.org/string>	"sometstring"@en
No	http://expl.org/expl	http://expl.org/string	sometstring
Yes	<http://expl.org/expl>	<http://expl.org/own>	"123k"^^<http://expl.org/owntype>
No	http://expl.org/expl	http://expl.org/own	123k

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.

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Workflows

• 01_Read_and_write_triples_from_and_to_fileKNIME Hub
• 05_ChEBI_ontology_explorerKNIME Hub
• 05_ChEBI_ontology_explorerKNIME Hub
• 08_SPARQL_ExecutorKNIME Hub
• 12_Exploring-pizza-ontology-with-semantic-webKNIME Hub
• Show all 11 workflows

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