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From Apache Wiki <>
Subject [Incubator Wiki] Update of "CommonsRDF" by SergioFernandez
Date Mon, 02 Feb 2015 07:52:45 GMT
Dear Wiki user,

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The "CommonsRDF" page has been changed by SergioFernandez:

initial draft

New page:
= Apache Commons RDF incubation proposal =

== Status ==


== Abstract ==

Commons RDF a set of interfaces for the RDF 1.1 concepts that can be used to expose common
RDF-1.1 concepts using common Java interfaces.

== Proposal ==

The main motivation behind this simple library is revise an historical incompatibility issue.
This library does not pretend to be a generic api wrapping those libraries, but a set of interfaces
for the RDF 1.1 concepts that can be used to expose common RDF-1.1 concepts using common Java
interfaces. In the initial phase commons-rdf is focused on a subset of the core concepts defined
by RDF-1.1 (URI/IRI, Blank Node, Literal, Triple, and Graph). In particular, commons RDF aims
to provide a type-safe, non-general API that covers RDF 1.1. In a future phase we may define
interfaces for Datasets and Quads.

The goal is to provide a compact API that could be implemented by the upcoming versions of
the main Java toolkits (Apache Jena 3.0 and OpenRDF Sesame 4.0) as well as for other libraries
(OWLAPI) and other JVM languages (Banana RDF and so on).

In addition, the project could provide some basic implementations suitable for some basic
scenarios. But the major and established Java toolkits will always remain the recommend implementations
to use.

== Background ==

In the Java world there has been historically an incompatibility issue between the two major
RDF toolkits: Apache Jena and OpenRDF Sesame. Many libraries have tried to wrap them, but
besides technical considerations, they normally end up being unmaintained.

Together, we came up with the idea of Commons RDF for solving the incompatibility problem.
The community has been in healthy development at GitHub, including participants from the major
Java RDF toolkits.

The natural path to Apache Commons Sandbox has been studied, but we think that in this phase
of the project, which focuses on the API design and actively involves the developers of existing
toolkits, it is better to have a more focused community and infrastructure. Rather than a
new Top-Level Project, the goal is still to graduate as part of Apache Commons, that is when
API has achieve the required maturity and the project goes into maintenance mode.

Part of the motivation for doing the incubator process would therefore be to bring together
the existing Commons RDF community in the Apache Way, mature the API, and then gradually prepare
the Commons RDF community for working within the larger Apache Commons community.

== Rationale ==

The library comes from the need for providing a generic and neutral API for RDF 1.1 that everybody
can transparently use without bounding the design to concrete implementations. It is the result
of cooperation between contributors to the main Java toolkits, and will try to be available
in a timely manner to influence the major version updates Jena 3.0 and Sesame 4.0.

== Initial Goals ==

 * Evolve the API towards a generalized and agreed shape
 * Bootstrap basic implementations 
 * Support the implementation 

== Current Status ==

The API is already quite agreed by all involved players, and it's been started to be prototyped,
both by the major toolkits and by simple implementations.

=== Meritocracy ===

Commons RDF has been completely designed by committee using git workflows, where every single
feature has been discussed based on a Pull Request. We plan to keep such methodology where
the commons understanding comes first than personal decisions.

=== Community ===

Commons RDF addresses the developers who are working with Semantic Web technologies in the
JVM. The initial committers are core contributors to that community.

=== Core Developers ===

 * Sergio Fernández (wikier dot apache dot org)
 * Andy Seaborne (andy dot apache dot org)
 * Peter Ansell (ansell dot apache dot org)
 * Stian Soiland-Reyes (stain at apache dot org)

=== Alignment ===

Commons RDF comes to help in the integration of the different ASF projects using RDF technologies,
where Apache Jena can be integrated with others which use Sesame (Any123 and Marmotta). In
addition, proposals by other projects (Clerezza and Stanbol) can be also aligned.

== Known Risks ==

=== Orphaned Products ===

Probably one of the major risks will that the API provided does not fit well in the development
plan of the main Java toolkits. But we try to minimize such risk by having on board core developers
of those framework, the API will live or die on its own merits.

=== Inexperience with Open Source ===

The committers have large experience with open source development and ASF communities.

=== Homogeneous Developers ===

The initial list of developers come from four different organizations and three different

=== Reliance on Salaried Developers ===

Although the project is also in the strategic agenda of project of our current employers,
so far the main development is happening at volunteer time.

=== Relationships with Other Apache Projects ===

The project really relates with Jena as one of the potential implementations, with Any23 and
Marmotta which are based on Sesame, and Clerezza and Stanbol as project that may benefit of
such common api. 

=== An Excessive Fascination with the Apache Brand ===

While we expect the Apache brand may help attract more contributors, our interests in starting
this project is based on the factors mentioned in the Rationale section.

== Documentation ==

Documentation for the current project can be found at GitHub:

== Initial Source ==

The current source code can be found at GitHub:

=== Source and Intellectual Property Submission Plan ===

The whole copyright is hold by the four developers signing this proposal, all of them already
with a ICLA with ASF in place. Current licence is already Apache Software License 2.0.

=== External Dependencies ===

All current dependencies have Apache compatible licenses, including MIT, BSD 3-clause, MIT
and EPL.

=== Cryptography ===

Does Not Apply.

== Required Resources ==

=== Mailing lists ===

 * commons-rdf-dev
 * commons-rdf-commits
 * commons-rdf-users

=== Repository ===

 * git://

=== Issue Tracking ===


=== Other Resources ===

 * Jenkins/Hudson for builds and test running.

== Initial Committers ==

 * Sergio Fernández (wikier dot apache dot org)
 * Andy Seaborne (andy dot apache dot org)
 * Peter Ansell (ansell dot apache dot org)
 * Stian Soiland-Reyes (stain at apache dot org)
 * Reto Gmür (reto at apache dot org)

=== Affiliations ===

 * Sergio Fernández (Redlink GmbH)
 * Andy Seaborne (Epimorphics Ltd)
 * Peter Ansell (CSIRO)
 * Stian Soiland-Reyes (University of Manchester)
 * Reto Gmür (Berner Fachhochschule)

== Sponsors ==

=== Champion ===

 * TBD

=== Nominated Mentors ===

 * TDB

=== Sponsoring Entity ===

Apache Incubator PMC

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