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typo3conf/ext/scriptmerger/Documentation/Caching/Index.rst

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+.. ==================================================
+.. FOR YOUR INFORMATION
+.. --------------------------------------------------
+.. -*- coding: utf-8 -*- with BOM.
+
+Caching
+-------
+
+The extension adds a folder inside the typo3temp directory that contains several subfolders for the different
+processes. If you are interested in the naming conventions of the files, you are encouraged to read the
+source code. Each file inside this folder contains a hash which is created with the md5 algorithm
+with the original file contents as a source. This is extremely useful, because we can detect changes to script
+files or stylesheets by a simple comparison and automatically include the current version in the next rendering process.
+
+The scriptmerger registers itself to a hook which is called after clearing of the caches. The registered class
+simply removes any files inside the mentioned directories above which have an access date that is older than
+two weeks.