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The af tool can be used to list information about an existing database. The -l option lists the documents contained in a database:
$ af -l -d mydb
Each line of output takes the form:
+ docid parent filename begin end doctype
where `docid' is an unique number identifying the document within the database, `parent' is the docid of the document that “contains” this document (or 0 if no such relationship exists), `filename' is the name of the file containing the document, `begin' and `end' are byte offsets indicating the beginning and ending of the document within the file, and `doctype' is the name of the document type associated with the document.