1. A computer-implemented method for establishing a search scope for a query of documents, comprising: identifying a property related to the documents, the property being associated with a scope of the documents; generating a scope-related index key according to the identified property, wherein the scope-related index key is emitted among a set of other index keys associated with a crawl of the documents; and generating an index that includes a document record that corresponds to the scope-related index key, wherein the document record is used in providing results to the query such that the search scope of the query is related to the scope-related index key when the query is authored to included the search scope.