Regarding csprd01 comment 056: I propose that we make the following two changes: 1. Allow <ctr:changeTrack> on the following additional extension points: <file> and <group> as it can potentially store change track information for any valid XLIFF element within the scope of the element where it is contained. 2. Remove the following text from “used in” for the checksum attribute: “ any XLIFF element that accepts attributes from any namespace.” The following attributes: author, datetime, and checksum appear on <source>, <target>, and <notes>, in the change tracking examples, but this is implicitly allowed by those elements being extensible, so does not need to be specified explicitly on the attribute itself. Thanks, Ryan