The infospace, Foxpath, ixml

Foxpath, short for folder XPath, is an expression language that enables XPath-like addressing of the files and folders in a file system. Both file systems and REST resources addressable through URIs can be thought of as a tree of folders, and thus navigated by path expressions in Foxpath. Foxpath is a superset of XPath 3.0 with node tree navigation retained but file system navigation added and a free combination of both functionalities allowed within a single path expression. Foxpath is a language with a strong focus on interactive use and the power of succinct expressions. Invisible XML allows us to extend Foxpath navigation to more resources. A new configuration mechanism associates grammars with file name patterns, enhancing the experience of a pervasive tree structure which we call an infospace.