Robust Parsing refers to one of a number of methods for modifying a grammar or parser in such a way as to allow for parsing to continue in the presence of parts of the input unexplained by the language grammar (i.e., syntax errors in the input). Typically this involves producing a parse tree in which unparseable sections of input are isolated into uninterpreted nodes containing the original input text.

-- JamesCordy - 10 Oct 2005