File Cache tab On this tab, you specify how to cache external XML and DTD files. See the XMLIN documentation for more information. Setting Description File cache base directory The file cache base directory. You can use an absolute path, or a path relative to the working directory of the StreamServer. XML and DTD documents are cached in a sub directory called XML. Enable XML cache Select to enable caching of XML and DTD documents. XML cache size The maximum number of documents in the XML cache directory. When the limit is exceeded, the oldest document is removed. XML cache time-out The "best before date" for a cached document. The StreamServer checks this date each time it retrieves a document from the cache. If the document is older than the cache time-out, it will be updated.