DeltaXML, experts in information change
Diff, compare and merge XML
DeltaXML has developed its core competency in the management of change using XML. As a result they have the pre-eminent product in XML document and data comparison, enabling XML-aware handling of changes to be added to any CMS that handles XML documents or data.
If your CMS handles only a specific type of XML, for example DITA or DocBook, then DeltaXML's format-specific solutions are the best solution. Tracked changes customised for different XML editors including wider use outside a CMS.