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Date: Tue, 24 Nov 2009 11:15:35 +0000
Message-ID: <71e1b5740911240315j5613f02cuaa82e3858e81da86@mail.gmail.com>
Subject: Re: [VOTE] Accept Apache Clerezza into the incubator
From: ant elder <ant.elder@gmail.com>
To: general@incubator.apache.org
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+1

   ...ant

On Mon, Nov 23, 2009 at 6:32 PM, Reto Bachmann-Gm=FCr
<reto.bachmann@trialox.org> wrote:
> Please vote on accepting Apache Clerezza for incubation at the Apache
> Incubator. The full proposal is available at the end of this message and
> as a wiki page at http://wiki.apache.org/incubator/ClerezzaProposal
> <http://wiki.apache.org/incubator/AceProposal>. We ask the Incubator PMC
> to sponsor it, with Bertrand as the Champion, and Gianugo, Niclas, Ross,
> Karl and Reinhard volunteering to be Mentors.
>
> Please cast your votes:
>
> [ ] +1, bring Clerezza into Incubator
> [ ] +0, I don't care either way,
> [ ] -1, do not bring Clerezza into Incubator, because...
>
> The vote is open for the next 72 hours and only votes from the Incubator
> PMC are binding.
>
> - - - - - - - - - -
>
> Abstract
>
> Clerezza is an OSGi-based modular application and set of components
> (bundles) for building RESTFul Semantic Web applications and services.
>
> Proposal
>
> Clerezza can be used as a platform providing all the compile and runtime
> requirement for building semantic applications, or used as individual
> bundles within an OSGi framework, e.g. Apache Sling, Apache ServiceMix,
> or the Eclipse platform.
>
> Clerezza provides:
>
> =A0 =A0* An API modeling the W3C RDF standard without any vendor specific
> additions.
> =A0 =A0* Adapter for various triple stores including Sesame, Jena TDB, an=
d
> Mulgara.
> =A0 =A0* Front-End adaptors, currently to run applications written agains=
t
> the Jena API. Support for RDF2Go is planned.
> =A0 =A0* A JAX-RS implementation designed to work in an OSGi environment
> and allowing to provide Root-Resources as OSGi services.
> =A0 =A0* Web access to RDF graphs, including a SPARQL-Endpoint.
> =A0 =A0* Extensions to JAX-RS allowing to bind Root-Resource classes to
> specific RDF-Types rather than to URI-Paths.
> =A0 =A0* Templating mechanism (Renderlets) allowing to render RDF resourc=
es
> returned by JAX-RS resource methods to various formats
> =A0 =A0*
>
> =A0 =A0 =A0Support for Scala for writing modules, ScalaServerPages to eas=
ily
> write renderlets, DSL for accessing graphs.
> =A0 =A0* Authentication and authorization based on JAAS and OSGi
> Conditional Permission Admin
> =A0 =A0* Support for user bundles: Users can have a permission to upload
> their own sandboxed bundles. The URI space these bundles are allowed to
> register their JAX-RS resources can be limited with a prefix.
> =A0 =A0* Scripting: Scripting based on javax.script (currently support fo=
r
> JRuby and Scala)
> =A0 =A0* Documentation: Bundles can provide their documentation in RDF.
> These are used for online documentation as well as for building Maven
> sites (with a Maven reporting plugin)
>
> The RDF abstraction layer can be used independently of other aspects of
> Clerezza. It allows applications to be written regardless the used
> backend. In its purpose, it is similar to RDF2Go, but provides a
> significantly more modular interface allowing e.g. to independently
> switch the storage, querying, or serialization layer. Furthermore, it
> doesn't introduce concepts alien to the RDF model such as blank node
> labels, but is in its core strictly limited to RDF semantics.
>
> The JAX-RS implementation can also be used independently of any other
> components. It allows OSGi services to provide a RESTful interface to
> their methods. By being based on wymiwyg WRHAPI, it can run both on the
> default OSGi Web Service as well as on a jetty instance listening on a
> different port.
>
> Background
>
> The current web trends focusing on information sharing, interoperability
> and collaboration. Therefore the behaviour of the end-user has changed
> over the last years: end-users not only consuming information they also
> producing content anytime anywhere - in contrast to non-interactive
> websites where users are limited to the passive viewing of information
> that is provided to them. Since the end-users are sensitized to the
> possibilities of the web the web application requirements increases.
> Examples of such applications are social-networking sites, wikis, blogs
> and mashups.
>
> The REST paradigm and Semantic Web technologies support these trends and
> form the basis for the upcoming Web of Data (a.k.a. linked data, Web
> 3.0). They change the paradigms for developing complex Web applications.
> Clerezza allows to develop applications that integrate perfectly in the
> Semantic Web providing all accessible resources in machine
> understandable formats without imposing additional burdens on the
> developer. Additionally, thanks to the flexibility of the RDF model used
> as back-end, some tedious database related tasks required for
> traditional Web application development are no longer needed.
>
> Rationale
>
> Most Web application framework are not designed to leverage the full
> power of HTTP but often try to reproduce non Web design patterns for the
> Web environment. In general, application frameworks are oriented towards
> relational or hierarchical data structures. While attempts to overcome
> this such as Drupal have become very popular, they do not at their core
> base on the stack of Semantic Web standards. Clerezza will prove that
> the flexibility of the RDF doesn't result in increased complexity, but
> on the contrary allows for fast prototyping and development.
>
> Initial Goals
>
> The initial goals for Clerezza are:
>
> =A0 =A0* Donate the existing codebase and import it.
> =A0 =A0* Setup the incubation infrastructure (svn repository, build syste=
m,
> website), so we can run continuous builds with automated tests and
> publish all available documentation.
> =A0 =A0* Get people involved in advancing the code base in different
> directions, integrating it with other projects at Apache.
> =A0 =A0* Prepare for an initial release that demonstrates the systems cor=
e
> capabilities.
>
> Current Status
>
> The current codebase is developed and tested using Apache Felix. It has
> been developed intensively and reviewed at trialox since August 2008
> using Scrum, with a development process emphasizing individual
> accountability and reviews. We have internally demonstrated that we can
> release codes as scheduled. Platform core functionalities are available,
> however the need for new features may arise, performance and robustness
> could be improved. Incomplete documentation for the project is available
> with the individual artifacts, both in the generated maven sites as in a
> version available exposed by Clerezza at runtime. We also have a wiki at
> http://wiki.trialox.org with some information mainly on the development
> process. We also use mailing lists for communication among developers
> and users.
>
> Meritocracy
>
> The core developers understand what it means to have a process based on
> meritocracy. We will provide continuous efforts to build an environment
> that supports this, encouraging community members to contribute.
>
> Community
>
> Trialox has been developing the current codebase since August 2008.
> Trialox was founded in partnership with the University of Zurich and
> could benefit from previous research work at the Department of
> Informatics. Part of the team from the beginning was Reto Bachmann Gm=FCr
> who has been developing open source Semantic Web applications for many
> years, including working with the Jena team at HP Labs.
>
> Trialox has contributed to the JAX-RS specification. Some of the code
> written by trialox is used by Open Source projects such Paxle and Gradino=
.
>
> Clerreza is used by globally active non-profit organisations such as the
> WWF. These organisations have strong developer networks including
> motivated volunteers, which will contribute to Clerezza.
>
> Core Developers
>
> People from Trialox, the University of Zurich, as well as partner
> companies of Trialox have contributed to the project. Currently, the
> following persons are core developers of Clerezza:
>
> =A0 =A0* Manuel Innerhofer, Developer at Trialox since November 2008.
> =A0 =A0* Hasan Hasan, Developer and Senior Researcher at University of
> Zurich since 2006, developing Clerezza since August 2008. His current
> research interests cover P2P networking, Service Level management, and
> Internet security.
> =A0 =A0* Tsuyoshi Ito, Developer and Scrum Master at Trialox, developing
> Clerezza since August 2008. He has researched at the University of
> Zurich since 2005. His research interest was computer-supported Learning
> (Educational Engineering)
> =A0 =A0* Reto Bachmann-Gm=FCr, Developer and Architect at Trialox, develo=
ping
> Clerezza since August 2008.
>
> Alignment
>
> We provide a launcher which runs Clerezza's bundles within Apache Felix.
> We also provide feedback about the usage of Apache Felix and its
> components including the framework security via the mailing list. For
> building Clerezza's bundles we use Apache Maven and various plugins. We
> also have developed a plugin to help managing projects which contain
> ontologies, so that Java classes representing those ontologies can be
> pre-compiled. Other projects which based on Web services and/or RDF can
> benefit from Clerezza or its specific bundles. We are open to
> collaborate with other Apache projects which can benefit from
> functionality provided by Clerezza. Clerezza has the advantage of being
> very modular and independent of application frameworks, thus can be
> easily integrated with other Apache projects. UIMA and Tika come to
> mind, as they would help extract semantic information from various data
> types and formats. An alignment to the JAX-RS implementation in Apache
> CXF could not only help removing the dependencies to the CDDL-licensed
> code taken from Jersey but also help providing a fully framework
> independent implementation with a larger group of developers and thus
> higher quality.
>
> Known Risks
>
> The current team of Clerezza core developers is small, but being an
> innovative project in the semantic "space", we are confident that
> Clerezza can attract new developers.
>
> Clerezza has been started as an Open Source project providing mercurial
> repository for public access to source codes and also a publicly
> accessible JIRA instance for issues tracking. Clerezza is licensed since
> project begin under Apache License version 2.0. Some of the initial
> committers already have strong experiences with Open Source software
> development. Others, while not being totally inexperience, are willing
> to learn.
>
> The risk that Clerezza will be an orphaned product is considered small.
> Three main factors will avoid this to happen:
>
> =A0 =A0* Trialox and its founder Getunik have a vital interest in continu=
os
> development in this open source foundation
> =A0 =A0* Clerezza is used as foundation for research as well a student
> projects at the University of Zurich
> =A0 =A0* There is a strong commitment by Reto Bachmann-Gm=FCr to maintain
> Clerezza
> =A0 =A0* WWF expressed their support to deploy Clerezza
>
> Documentation
>
> A small set of further documentation is available under the following lin=
ks:
>
> =A0 =A0*
> http://trialox.org/projects/org.clerezza.rdf.core/documentation/overview.=
xhtml
> =A0 =A0*
> http://trialox.org/projects/org.clerezza.triaxrs.parent/org.clerezza.tria=
xrs/documentation/
>
>
> Initial Source
>
> Clerezza has been in development since mid 2008. Public access to the
> source is provided through http://scm.trialox.org/.
>
> Source and Intellectual Property Submission Plan
>
> The current codebase is owned by trialox, and will be donated together
> with its documentation. We will get the paperwork out of the way as soon
> as possible.
>
> External Dependencies
>
> There are quite a few open source libraries already used. They have
> Apache compatible licenses, with one issue to solve around Jersey which
> is CDDL.
>
> The libraries, their sources and licenses are listed here:
>
> Apache Felix, ASL:
>
> =A0 =A0* Framework
> =A0 =A0* Framework Security
> =A0 =A0* Configuration Admin
> =A0 =A0* maven-scr-plugin
> =A0 =A0* maven-bundle-plugin
>
> OSGi Alliance, ASL:
>
> =A0 =A0* Core
> =A0 =A0* Compendium
>
> Apache Maven, ASL:
>
> =A0 =A0* apache-maven
>
> Eclipse, ASL:
>
> =A0 =A0* Jetty
>
> OPS4J, ASL:
>
> =A0 =A0* Pax Exam
> =A0 =A0* Pax Logging
> =A0 =A0* Pax protocol mvn-uri
>
> WYMIWYG, ASL:
>
> =A0 =A0* wrhapi
> =A0 =A0* wymiwyg-commons
>
> jQuery, MIT license:
>
> =A0 =A0* jquery
>
> Hewlett-Packard Development Company, BSD License:
>
> =A0 =A0* Jena (for the optional jena forntend adaptor, as well as for jen=
a
> based serializer/parser)
> =A0 =A0* Jena TDB (for the optional tdb backend adaptor)
>
> OpenRDF.org, BSD license (for the optional sesame backend adaptor):
>
> =A0 =A0* Sesame
>
> Mulgara.org, Open Software License ("OSL") v. 3.0 (for the optional
> mulgara backend adaptor):
>
> =A0 =A0* mulgara
>
> XSite (http://xsite.codehaus.org/), BSD license:
>
> =A0 =A0* xsite-maven-plugin
>
> Jersey (https://jersey.dev.java.net/), CDDL license
>
> The current code bases on code licensed under the CDDL, according to
> http://apache.org/legal/resolved.html we understand we have to get rid
> of these before making a release, or redistribute in binary form only.
> The following files are affected.
>
> =A0 =A0* QualityFactor.java
> =A0 =A0* HttpDateFormat.java
> =A0 =A0* HttpHeaderReaderImpl.java
> =A0 =A0* UriPattern.java
> =A0 =A0* UriComponent.java
> =A0 =A0* HttpHeaderListAdapter.java
> =A0 =A0* MultivaluedMapImpl.java
> =A0 =A0* HttpHeaderReader.java
> =A0 =A0* ByteArrayProvider.java
> =A0 =A0* SourceProvider.java
> =A0 =A0* AbstractMessageReaderWriterProvider.java
> =A0 =A0* StreamingOutputProvider.java
> =A0 =A0* FormMultivaluedMapProvider.java
> =A0 =A0* FileProvider.java
> =A0 =A0* ReaderProvider.java
> =A0 =A0* InputStreamProvider.java
> =A0 =A0* MediaTypeProvider.java
> =A0 =A0* EntityTagProvider.java
> =A0 =A0* CacheControlProvider.java
> =A0 =A0* NewCookieProvider.java
> =A0 =A0* CookieProvider.java
>
> Required Resources
>
> Mailing lists:
>
> =A0 =A0* clerezza-dev
> =A0 =A0* clerezza-commits
> =A0 =A0* clerezza-user (only after leaving the incubator)
>
> Subversion:
>
> =A0 =A0* https://svn.apache.org/repos/asf/incubator/clerezza
>
> Issue Tracking:
>
> =A0 =A0* JIRA: Apache Clerezza (Clerezza)
>
> Initial Committers
>
> These committers have either worked on the initial codebase (Reto,
> Immanuel, Tsuy, Hasan) or expressed an interest in extending the project:
>
> =A0 =A0* Reto Bachmann-Gm=FCr (trialox)
> =A0 =A0* Manuel Innerhofen (trialox)
> =A0 =A0* Tsuyoshi Ito (trialox)
> =A0 =A0* Hasan Hasan (University of Zurich)
> =A0 =A0* Bertrand Delacretaz (ASF member, Day Software)
> =A0 =A0* Michael Marth (Day Software)
> =A0 =A0* Tommaso Teofili (Apache UIMA committer)
>
> Affiliations
>
> Manuel Innerhofen, Tsuyoshi Ito and Reto Bachmann-Gm=FCr work at trialox
> and might get paid to work on Clerezza.
>
> Hasan Hasan from University of Zurich is paid to work in a project that
> is based on Clerezza.
>
> Michael Marth and Bertrand Delacretaz work for Day Software.
>
> Sponsors
>
> We have approached both the champion and an initial list of mentors that
> have agreed to mentor this project.
>
> Champion:
>
> =A0 =A0* Bertrand Delacretaz
>
> Mentors:
>
> =A0 =A0* Gianugo Rabellino
> =A0 =A0* Niclas Hedhman
> =A0 =A0* Ross Gardler
> =A0 =A0* Karl Pauls
> =A0 =A0* Reinhard P=F6tz
>
> Sponsor:
>
> =A0 =A0* Apache Incubator
>
> --
> Reto Bachmann-Gm=FCr
> trialox.org
> Tel: +41445005015
>
>
>
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