Abstract: Methods, systems, and apparatus, including computer program products are provided for indexing tags in source code. Implementations provide an enhanced retrieval of source code, in which a score for each of a plurality of files is derived based on a quantity of references to each file in source code of the remaining plurality of files. A query is received identifying a source code tag. Matching files of the plurality of files that satisfy the query are identified, a ranking of the matching files is generated based on the derived scores, and the ranking is provided.

Abstract: Methods, systems, and apparatus, including computer program products are provided for indexing tags in source code. Implementations provide an enhanced retrieval of source code, in which a score for each of a plurality of files is derived based on a quantity of references to each file in source code of the remaining plurality of files. A query is received identifying a source code tag. Matching files of the plurality of files that satisfy the query are identified, a ranking of the matching files is generated based on the derived scores, and the ranking is provided.

Abstract: TAG files are generated on a client and communicated to a server. The TAGS files are indexed and loaded into memory on the server. Search requests are run against the index and files that contain tags that satisfy the search request are ranked. The ranking is based on an include-tree of the file that contains the tag, the relative directory distance of the file containing the tag from the current context, or by using the numbers of levels of inclusion needed to reach a tag that satisfies the query. In some implementations, an extensible protocol is used to communicate the search queries and files that contain tags that satisfy the search query.