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~-[[DebianWiki/EditorGuide#translation|Translation(s)]]: none-~
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= Resource Description Framework =

[[http://www.w3.org/RDF/|RDF]] is a W3C standard, which is a key to interoperability in exchange of data between different services, as data encoded in RDF is self-described to a certain extent, using Semantic Web techniques. RDF can be encoded in XML, or more textual formats like Turtle, or JSON-LD.

This page intends to hold pointers about various Semantic Web / RDF resources and tools linked to Debian.

= Tools packaged in Debian =

 * [[http://packages.debian.org/raptor2-utils|raptor2-utils]]: provides the `rapper` tool capable of parsing and serializing in various RDF serialization formats
 * [[http://packages.debian.org/rasqal-utils|rasqal-utils]]: provides the `roqet` tool for querying RDF graphs
 * ''more to be filed here''

The debtags tool knows a [[http://debtags.debian.net/search/bytag?wl=works-with::semantic-data&bl=&tq=|semantic data category]] that can be queried for a comprehensive list (assignment of tags pending).

= Semantic data about Debian =

Some elaborated discussion of such needs is documented in [[http://www-public.telecom-sudparis.eu/~berger_o/papier-oss2013/|Authoritative Linked Data descriptions of Debian source packages using ADMS.SW]]

== RDF descriptions of Debian source packages on the PTS ==

Every Debian source package should have an RDF/XML representation available at {{{http://packages.qa.debian.org/src_pkg_name}}}

See for instance the apache2 data at : http://packages.qa.debian.org/apache2 ({{{rapper -o turtle http://packages.qa.debian.org/apache2}}} or {{{curl -L -H 'Accept: application/rdf+xml'  http://packages.qa.debian.org/apache2}}}

Further information about this service is available on [[qa.debian.org/pts/RdfInterface]].

[[DebianBug:685605|#685605]] discusses both this and the UDD export.

== UDD exports ==

The data available in [[UDD]] (Ultimate Debian Database) is exported as described on [[Services/rdf.debian.net]].

[[DebianBug:685605|#685605]] discusses both this and the PTS export.

== Discussion about further data ==

=== Describing the Debian project per se ===

 * http://lists.debian.org/debian-project/2011/05/msg00069.html for a discussion about a [[DOAP]] profile for the Debian project

=== Describing Debian contributors ===

 * http://lists.debian.org/debian-project/2011/06/msg00000.html for Alioth users [[FOAF]] profiles an projects DOAP descriptions
 * http://contributors.debian.org/ by now has more comprehensive information.

=== Bug tacker ===

 * [[DebianBug:590931|#590931]] : RDFa for debbugs
 * This would profit from having bts-track data available as well.
 * For ontologies, there is [[http://www.w3.org/2005/01/wf/flow#|webflow]] and [[http://ontologi.es/doap-bugs#|doap-bugs]] (the latter being compatible with the former by statements like `dbugs:blocks rdfs:subPropertyOf [ owl:inverseOf flow:dependent ]`).
 * Barely any tools exist that deal with semantic issue tracking, [[https://github.com/taskify/taskify|taskify]] uses it, and [[https://github.com/linkeddata/tabulator|tabulator]] has something related as well.

=== DebTags ===

Serving DebTags as RDF is discussed in [[http://lists.alioth.debian.org/pipermail/debwebid-discuss/Week-of-Mon-20150810/000027.html|a debwebid thread]]

[[http://www.webpages.uidaho.edu/~mbolin/putkey.htm|Putkey2011]] contains suggestions on how to represent faceted information using the [[http://www.w3.org/2004/02/skos/core#|SKOS]] vocabulary, which is employed in the current drafts.

=== [[doc-base]] ===

The data in doc-base is already well structured and suitable for semantification. (Bonus points for finding copies of the documents available online).