11. A computer program product comprising a computer readable storage medium having a computer readable program stored therein, wherein the computer readable program, when executed on a computing device, causes the computing device to: receive a document data structure comprising a renaming directive in natural language textual content of the document data structure, wherein the renaming directive is a statement that specifies a correspondence between a full expression and a moniker that is stand-in text for the full expression; apply filter logic to the document data structure to identify the renaming directive within the natural language textual content of the document data structure; analyze the renaming directive to identify a relationship between semantic concepts represented by the renaming directive that are to be used to update a lexical resource based on the renaming directive; update the lexical resource based on results of analyzing the renaming directive; and output the updated lexical resource to a linguistic analysis system, wherein the linguistic analysis system performs linguistic analysis of a portion of textual content based on the updated lexical resource.
15. The computer program product of claim 11 , wherein the filter logic comprises patterns or rules for identifying a full expression and a moniker that refers to the full expression.