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| <html> |
| <head> |
| <title>Apache UIMA v2.8.0 Release Notes</title> |
| </head> |
| <body> |
| <h1>Apache UIMA (Unstructured Information Management Architecture) v2.8.0 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" -> "language |
| specific segmentation" -> "sentence boundary |
| detection" -> "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> |
| |
| <h3>Iterating over sorted indexes performance improvement</h3> |
| <p>Sorted index usage by iterators is monitored, and when it is determined that |
| a particular index is no longer being updated and is experiencing poor performance due to |
| merging of subindexes for the subtypes being iterated over, a one-time conversion |
| of this index to a "flattened" version is done; the flattened form incurs the cost |
| of merging subindexes once, and for subsequent uses, iteration speed is improved. |
| Any update that affects this flattened index will cause it to be discarded and |
| not used for subsequent iterations. Performance improvement should be seen for the |
| perhaps common use case where one annotator creates and indexes instances of a type and its subtypes, |
| and subsequent annotators read and perhaps update these, |
| but don't add or remove entries of this type/subtypes from the index. |
| Jira issue <a target="_blank" href="https://issues.apache.org/jira/browse/UIMA-4357">UIMA-4357</a></p> |
| |
| <h3>Other major changes</h3> |
| <ul><li>The Document Analyzer's Java-based Cas Viewer was extended to support being |
| able to select which annotations are highlighted, using a selection approach where you can |
| specify a type plus a feature of that type plus one or more values of that feature. |
| Jira issue <a target="_blank" href="https://issues.apache.org/jira/browse/UIMA-3374">UIMA-3374</a></li> |
| |
| <li>Performance for iterators over UIMA Set Indexes was improved. |
| Jira issue: <a target="_blank" href="https://issues.apache.org/jira/browse/UIMA-4345">UIMA-4345</a>.</li> |
| </ul> |
| |
| <h3>API changes</h3> |
| <p>Note that we have moved to a more formal semantic versioning, following |
| the ideas in <a target="_blank" href="http://semver.org/">http://semver.org/</a>.</p> |
| <p> |
| There were no API changes that affect backward compatibility. Some new APIs were added or extended.</p> |
| <ul> |
| <li>Add back the API <code>alreadyCopied</code> that was accidentally removed in the CasCopier class in version 2.7.0. |
| Jira issue: <a target="_blank" href="https://issues.apache.org/jira/browse/UIMA-4428">UIMA-4428</a>.</li> |
| |
| <li>add new variants of <code>getAllIndexedFS, getIndex, and getAnnotationIndex</code> which take an additional argument |
| that specifies the JCas class, and permits these to return the correct generically typed indexes. |
| Jira issue: <a target="_blank" href="https://issues.apache.org/jira/browse/UIMA-4299">UIMA-4299</a>.</li> |
| </ul> |
| |
| <h2><a id="list.issues">Full list of JIRA Issues Fixed in this Release</a></h2> |
| Click <a href="issuesFixed/jira-report.html">issuesFixed/jira-report.hmtl</a> for the list of |
| issues fixed in this release. |
| |
| <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> |
| </p> |
| |
| |
| </body> |
| </html> |
