Importance

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Abstract

Arbitrary content-files on arbitrary computing platforms are enclosed by content-wrappers. The content-wrapper also binds searchable metadata that describes the content-files within the content-wrapper, as well as user-defined metadata. The metadata can include a title, author, date, and keywords that describe the content-file. The metadata provides searchable text for arbitrary content-files, including non-textual content-files such as graphics, audio, video, and multimedia content. Thus non-textual as well as textual data can be searched. The format of the original content-file is unimportant since the content-file is wholly embedded within the content-wrapper, or a reference (such as a URL) to the content is embedded within the content-wrapper. Content-wrappers can thus enclose any kind of file or even a data stream. Content-wrappers are designed for different computers and operating systems such as Microsoft-Windows-based PC's, UNIX workstations, and Apple Macintosh computers. Since the searchable metadata resides with the content-files on distributed platforms, a centralized search database is not needed. Instead, a search is conducted by successively reading the searchable metadata in wrappers on each computer connected to a network. A mapping metadata tag is used to provide a broad category that groups together various local names for metadata tags with similar meaning. Different applications can use different local names for metadata, yet the mapping metadata tag allows these local names to be searched together as a single criteria.

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