Documentation for JIRA 4.1. Documentation for other versions of JIRA is available too. 
Please note: The build.xml file is an Ant file, which when invoked with the build.(sh|bat) script, will construct a deployable webapp. The build.xml file does this by copying the contents of the webapp/ directory, and overwriting it with the contents of edit-webapp/. Thus, never edit files in the webapp/ directory! If a file needs editing, first copy it from webapp/path/to/file to edit-webapp/path/to/file, and edit it there.
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