7. The method of claim 1 further comprising: defining a grammar for constructing and referring breadcrumb search strings from the extracted individual breadcrumbs.
7. The method of claim 1 further comprising: defining a grammar for constructing and referring breadcrumb search strings from the extracted individual breadcrumbs. 8. The method of claim 7 wherein defining the grammar comprises: specifying construction of a breadcrumb query including positioning of a user entered search string via a specified delimiter; specifying positioning in the breadcrumb query of other contextual information; and specifying construction of hints, if any are available, and delimited breadcrumb representations for the hints.