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From Andy Seaborne <a...@apache.org>
Subject [ANN] Apache Jena 4.0.0
Date Thu, 01 Apr 2021 09:46:07 GMT
The Apache Jena development community is pleased to
announce the release of Apache Jena 4.0.0

In this release:

* Require Java11 runtime.

* RDF-star implementation up-to-date with community work.

* IRIx abstraction
   See notes about future changes.

* Add support for scripting languages other than JavaScript
   JENA-1951 - Pavel Mikhailovskii

* Model API fix Alt, Seq, Bag (Containers)
   JENA-2075

* jena-core: rename RDFReader as RDFReaderI
   and RDFWriter a RDFWriterI to avoid name clashes
   JENA-2038

* Upgrade to Apache Lucene 8.8.0
   See notes.

* Remove property functions:
         list:listMember list:listIndex, list:listLength
    Use list:member, list:index, list:length

* Retire modules SDB, jena-text-es, and jena-elephas

* The default git branch is 'main'

* Deprecation cleanup

62 tickets this release:
https://s.apache.org/jena-4.0.0-jira

==== Notes

Lucene:

This is a major version number upgrade. Apache Lucene policy is 
generally "two major versions" so if your text index was created awhile 
ago, you may need to reload even if you have been upgrading Jena itself.

     https://lucene.apache.org/core/8_8_0/MIGRATE.html

IRIs:

There is a new internal API for working with different IRI implementations.

The implementation in Jena 4.0.0 is the same as Jena3 jena-iri.

There a some areas to be aware of for future changes:

+ %ZZ (%-and non-hex digits) are illegal syntax in IRIs.
   It has never been legal in the RFCs but could be read in.

+ urn: The correct form of a URN, by the RFC definition, is
   urn:NID:NSS where NID is at least two characters and NSS is at least
   one character.

   <urn:x:abcd> is illegal as is <urn:abc:>
   These are not rejected by Jena 4.0.0 but be warned!

If you have custom URIs schemes, please ensure they match the syntax of 
RFC 3986/3987.

== Obtaining Apache Jena 4.0.0

* Via central.maven.org

The main jars and their dependencies can used with:

       <dependency>
         <groupId>org.apache.jena</groupId>
         <artifactId>apache-jena-libs</artifactId>
         <type>pom</type>
         <version>4.0.0</version>
       </dependency>

Full details of all maven artifacts are described at:

     http://jena.apache.org/download/maven.html

* As binary downloads

Apache Jena libraries are available as a binary distribution of
libraries. For details of a global mirror copy of Jena binaries please see:

http://jena.apache.org/download/

* Source code for the release

The signed source code of this release is available at:

     http://www.apache.org/dist/jena/source/

and the signed master source for all Apache Jena releases is available
at: http://archive.apache.org/dist/jena/

== Contributing

If you would like to help out, a good place to look is the list of
unresolved JIRA at:

     http://s.apache.org/jena-jira-current

or review pull requests at

     https://github.com/apache/jena/pulls

or drop into the dev@ list.

We use github pull requests and other ways for accepting code:
      https://github.com/apache/jena/blob/master/CONTRIBUTING.md

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