13. A computing system for creating a document structure model of a computer parsable text document utilizing recognition of at least one ordered sequence of identifiers in the document, the system comprising: a document conversion graphical user interface; a conversion processor for converting at least one computer parsable text document of any format to an alternative structured language format to form a converted document; a text fragmenter for fragmenting the text of said converted document, wherein fragmenting comprises breaking said converted document into an ordered sequence of text fragments within a text format; an enumeration module for enumerating said text fragments to obtain a sequence of terms, wherein each said term comprises a matching fragment; a selection module for identifying at least one optimal sub-sequence of terms, wherein said optimal sub-sequence comprises at least one longest increasing sub-sequence from among said sequence of terms; and an association module for annotating the computer parsable text document with tags, wherein said tags comprise information derived from identification of said at least one optimal sub-sequence.
16. The system according to claim 13 , wherein said text fragments include at least one member selected from the group comprising at least one line of text, a portion of a line of text, and a single word.