A robot-based resource discovery tool for adding chemical meta-informationand value to web-based documents

We report a set of tools to be used in conjunction with a robot-based Inter net indexing engine which can be used to convert non-conforming HTML collec tions to well-formed and valid XHTML documents. The tools, inter alia, can correct invalid syntax which can occur in embedded RasMol scripts and extra ct chemical mete-information from normally inaccessible document components , including transcluded chemical files. The index that can be built from th e transformed documents can be used to improve the quality of searches carr ied out in a chemical context.