13. An article as in claim 10 , wherein the initiating comprises: displaying at least a portion of the data characterizing the identified documents.
10. An article of manufacture comprising: computer executable instructions non-transitorily stored on computer readable media, which, when executed by a computer, causes the computer to perform operations comprising: parsing a search query of a collection of electronic documents to identify one or more terms and one or more term separators; retrieving, from a terms positional inverted index, at least one terms inverted list corresponding to at least one identified term, the terms positional inverted index comprising a first plurality of inverted lists mapping exact representations of terms to documents and associated document positions within the collection of electronic documents; retrieving, from a separators positional inverted index, at least one separators inverted list corresponding to at least one identified separator, the separators positional inverted index comprising a second plurality of inverted lists mapping term separators to documents and associated document positions within the collection of electronic documents, the separators positional inverted index being separate from the terms positional inverted index; identifying documents common to the retrieved at least one terms inverted list and to the retrieved at least one separators inverted list; and initiating provision of data characterizing the identified documents.