18. The searchable network of claim 17 wherein the search engines each comprise: mapping means for reading the tag-mapping field in the metadata tags and comparing the tag-mapping field to a search category to determine which metadata tags fit in the search category; and compare means for comparing text only from metadata tags having tag-mapping fields that match the search category, whereby the distributed search is limited to metadata tags fitting the search category.
17. The searchable network of claim 16 wherein the variety of formats includes Windows-readable formats when the content is originally created on a Windows-based personal computer (PC), but the variety of formats also includes UNIX-readable formats when the content is originally created on a UNIX-based computer, whereby the content-package files bind searchable metadata to content on different computing platforms on the searchable network.