[ANN] Apache Jena 4.2.0

[Andy Seaborne <an...@apache.org>]

The Apache Jena development community is pleased to
announce the release of Apache Jena 4.2.0

In this release:

* ShEx engine
   JENA-2112
   See https://jena.apache.org/documentation/shex/

* Support for reading JSON-LD 1.1
   JENA-1948
   JSON-LD 1.1 uses the Titanium system.
   https://github.com/filip26/titanium-json-ld

jsonld-java is still there for JSON-LD 1.0.
In this release, JSON-LD 1.0 is the default for reading JSON-LD.

JENA-2114: SHACL: Provide SPARQL targets

JENA-2123: Upgrade to Jetty10

Contributions:

Claus Sadler:
JENA-2132 : RDF-star fix
JENA-2154 : Custom SERVICE executors
   Experimental: Using SERVICE for extension functionality.

Erich Bremer:
JENA-2159: schema.org vocabulary
JENA-2155: Add Web Access Control vocabulary

Jan Martin Keil:
JENA-2142: Extend DatatypeFormatException

Tickets this release:
https://s.apache.org/jena-4.2.0-jira

==== Notes

This release does not include binary artifacts for OSGi.

Due to problems encountered late in the development cycle, we have not 
released OSGi artifacts to maven central.

If you are able to help with the production of Jena's OSGi artifacts, 
please drop into the dev@ list.

== Obtaining Apache Jena 4.2.0

* 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>4.2.0</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