Although many different metasyntaxes are possible, Backus-Naur form (BNF), Wirth Syntax Notation (WSN), Extended Backus-Naur form (EBNF), and Augmented Backus-Naur form (ABNF), which express syntax as a set of derivation rules, are almost universally used. The variables in these metasyntaxes are properly known as metasyntactic variables, although the term is used informally in other ways.
US Patent Issued to Hewlett-Packard Development on Nov. 27 for "Validating an Electronic Transaction" (Texas Inventors)
Dec 01, 2012; ALEXANDRIA, Va., Dec. 1 -- United States Patent no. 8,321,235, issued on Nov. 27, was assigned to Hewlett-Packard Development Co....