Apache UIMA v2.8.1 Release Notes

# Apache UIMA (Unstructured Information Management Architecture) v2.8.1 Release Notes

## Contents

What is UIMA?
Major Changes in this Release
How to Get Involved
How to Report Issues
List of JIRA Issues Fixed in this Release

## 1. What is UIMA?

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.

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 OASIS, a standards organization). We invite and encourage you to participate in both the implementation and specification efforts.

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.

## Major Changes in this Release

The flattened index support added in 2.8.0 has some edge cases where the flattened version needs to be invalidated. In trading off complexity versus performance improvements, we decided to disable this feature for now. UIMA-4542

A few bugs were fixed in the CasAnnotationViewer UIMA-4533, a name-clash was fixed in an internal method, which could clash with a JCas-generated name if there was a feature that happened to be named "TypeCode" UIMA-4534, and the CasCopier code was improved to cover an additional use case UIMA-4541

### API changes

There were no API changes that affect backward compatibility.

## Full list of JIRA Issues Fixed in this Release

Click issuesFixed/jira-report.hmtl for the list of issues fixed in this release.

## How to Get Involved

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 http://uima.apache.org/get-involved.html.

## How to Report Issues

The Apache UIMA project uses JIRA for issue tracking. Please report any issues you find at http://issues.apache.org/jira/browse/uima