17. A system comprising: a processor; a memory containing an application of a second electronic document management system (EDMS) which when executed by the processor configures the processor to generate a document revision history for versions of a document managed by a first EDMS by performing an operation, by the second EDMS, comprising: importing, from the first EDMS into a first location of the second EDMS, metadata describing a first document revision history for the versions of the document managed by the first EDMS, wherein the first document revision history comprises metadata attributes in a first format associated with the first EDMS and describes an actual revision history of the document, generating, by the second EDMS and from the metadata describing the first document revision history, a second document revision history comprising metadata attributes in a second format associated with the second EDMS, wherein the second document revision history provides a mirrored revision history mirroring the actual revision history, and wherein one or more metadata attributes in the second format are distinct from one or more corresponding metadata attributes in the first format; importing the second document revision history from the first location into a repository managed by the second EDMS, and importing the versions of the document from the first location into the repository managed by the second EDMS.
17. A system comprising: a processor; a memory containing an application of a second electronic document management system (EDMS) which when executed by the processor configures the processor to generate a document revision history for versions of a document managed by a first EDMS by performing an operation, by the second EDMS, comprising: importing, from the first EDMS into a first location of the second EDMS, metadata describing a first document revision history for the versions of the document managed by the first EDMS, wherein the first document revision history comprises metadata attributes in a first format associated with the first EDMS and describes an actual revision history of the document, generating, by the second EDMS and from the metadata describing the first document revision history, a second document revision history comprising metadata attributes in a second format associated with the second EDMS, wherein the second document revision history provides a mirrored revision history mirroring the actual revision history, and wherein one or more metadata attributes in the second format are distinct from one or more corresponding metadata attributes in the first format; importing the second document revision history from the first location into a repository managed by the second EDMS, and importing the versions of the document from the first location into the repository managed by the second EDMS. 20. The system of claim 17 , wherein importing the versions of the document comprises storing a unique identifier that identifies each version of the document in the first EDMS.