Railo 4.2 Reference
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Creates an absolute, platform-appropriate path that is
equivalent to the value of relative_path, appended to the base
path. This function (despite its name) can accept an absolute
or relative path in the relative_path attribute


expandpath(string relative_path):string


The arguments for this function are set. You can not use other arguments except the following ones.
Name Type Required Description
relative_path string  Yes Relative or absolute directory reference or filename, within the current directory, (.\\ and ..\\) to convert to an absolute path. Can include forward or backward slashes.