Mapping URL Patterns to Files with AliasMatch

AliasMatch ^/(docs|help) /usr/local/apache/htdocs/ manual

The AliasMatch directive provides a similar behavior to Alias, but enables you to specify a regular expression for the URL. The matches can be substituted in the destination path. For example, this directive will match any URL under /help or /docs to filesystem paths under the manual directory. Regular expressions are strings that describe or match a set of strings, according to certain syntax rules. You can learn more about regular expressions at http://en.wikipedia.org/wiki/Regular_expression.