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<title>Apache UIMA v3.0.2 Release Notes</title>
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<h1>Apache UIMA (Unstructured Information Management Architecture) v3.0.2 Release Notes</h1>
<h2>Contents</h2>
<p>
<a href="#what.is.uima">What is UIMA?</a><br/>
<a href="#major.changes">Major Changes in this Release</a><br/>
<a href="#get.involved">How to Get Involved</a><br/>
<a href="#report.issues">How to Report Issues</a><br/>
<a href="#list.issues">List of JIRA Issues Fixed in this Release</a><br/>
</p>
<h2><a id="what.is.uima">1. What is UIMA?</a></h2>
<p>
Unstructured Information Management applications are
software systems that analyze large volumes of
unstructured information in order to discover knowledge
that is relevant to an end user. UIMA is a framework and
SDK for developing such applications. An example UIM
application might ingest plain text and identify
entities, such as persons, places, organizations; or
relations, such as works-for or located-at. UIMA enables
such an application to be decomposed into components,
for example "language identification" -&gt; "language
specific segmentation" -&gt; "sentence boundary
detection" -&gt; "entity detection (person/place names
etc.)". Each component must implement interfaces defined
by the framework and must provide self-describing
metadata via XML descriptor files. The framework manages
these components and the data flow between them.
Components are written in Java or C++; the data that
flows between components is designed for efficient
mapping between these languages. UIMA additionally
provides capabilities to wrap components as network
services, and can scale to very large volumes by
replicating processing pipelines over a cluster of
networked nodes.
</p>
<p>
Apache UIMA is an Apache-licensed open source
implementation of the UIMA specification (that
specification is, in turn, being developed concurrently
by a technical committee within
<a href="http://www.oasis-open.org">OASIS</a>,
a standards organization). We invite and encourage you
to participate in both the implementation and
specification efforts.
</p>
<p>
UIMA is a component framework for analysing unstructured
content such as text, audio and video. It comprises an
SDK and tooling for composing and running analytic
components written in Java and C++, with some support
for Perl, Python and TCL.
</p>
<h2><a id="major.changes">Major Changes in this Release</a></h2>
<p>Version 3.0.2 is a minor update to 3.0.1.</p>
<p>
When migrating from v2, if non-built-in JCas cover classes are being used,
a one-time regeneration or migration step is required for these.
Please read the Version 3 users guide located in the docs directory
for information on these changes and the migration tool which can
aid in migrating existing JCas class definitions.
</p>
<p>A very brief summary of version 3 vs version 2:</p>
<ul><li>Feature Structures become Java Objects,
subject to Garbage Collection, just like any other objects,
when no longer reachable.</li>
<li>Iterating over indexes no longer throws
ConcurrentModificationException.</li>
<li>Support for arbitrary Java Objects in the CAS,
using special custom implementations of JCas cover classes for those.</li>
<li>Using the above new capability, new semi-built-ins for three new types: ArrayList style
lists of Feature Structures and ints, and an FSHashSet</li>
<li>New "select" framework for flexible
access to Feature Structures, that can ignore typeOrdering keys in indexes.</li>
<li>Integration with Java 8 facilities such as Streams</li>
<li>Logging framework upgraded, supporting embedding UIMA in other frameworks using
popular logging APIs</li>
<li>There are many performance improvements</li>
</ul>
<p>Please read the Version 3 users guide for more details.</p>
<p>Specific changes in this release that track the same changes in version 2.10.3 include</p>
<ul>
<li>The code and the build
was adjusted to compile using both Java 8 and Java 11.</li>
<li>The class loading when using the UIMA Class Loader now will first try loading
from that class loader's URL list, and if not found will try using the
Context Class Loader (if set), and if not found, then will default to
how it previously searched for classes.
Previously the Context Class Loader was never consulted.</li>
<li>Fixed PEAR installation to no longer lock files.</li>
<li>Pear Specifier parameters now passed to the wrapped Analysis Engine</li>
<li>Implemented a destroy() method for ResourceManager which closes its UIMAClassLoader</li>
</ul>
<p>Specific changes in release 3.0.2 versus 3.0.1 include</p>
<ul>
<li>supporting additional JCas use cases, where (due to changes in type systems) some feature might migrate
over time from subclasses to superclasses.</li>
<li>reverting some changes to APIs so the v3 APIs more closely match v2 for improved binary compatibility.
Binary compatibility improves the ability to run using UIMA v3 without recompiling classes / Jars
built using UIMA v2 (except for JCas classes).</li>
</ul>
<h3>API changes</h3>
<p>There is an API compatibility report covering the non-internal APIs;
see <a href="api-change-report.html">change report</a> for the list of API changes
since version 3.0.1.
</p>
<h2><a id="list.issues">Full list of JIRA Issues affecting this Release</a></h2>
Click <a href="issuesFixed/jira-report.html">issuesFixed/jira-report.hmtl</a> for the list of
issues affecting this release.
<p>Please use the mailing lists
( http://uima.apache.org/mail-lists.html )
for feedback.</p>
<h2><a id="get.involved">How to Get Involved</a></h2>
<p>
The Apache UIMA project really needs and appreciates any contributions,
including documentation help, source code and feedback. If you are interested
in contributing, please visit
<a href="http://uima.apache.org/get-involved.html">
http://uima.apache.org/get-involved.html</a>.
</p>
<h2><a id="report.issues">How to Report Issues</a></h2>
<p>
The Apache UIMA project uses JIRA for issue tracking. Please report any
issues you find at
<a href="http://issues.apache.org/jira/browse/uima">http://issues.apache.org/jira/browse/uima</a>
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