Segment Number versus Segment Identifier (SID)
When you open an asset in the Browser Workbench, you will see that every segment pair has a segment number (also called sequence number) associated with it, appearing to the left of the source segment. This number is assigned after the segment has been created. It is not used during the leverage process; rather, it results from the leverage process. This segment number is basically a label that you can use when referring to a segment pair. For example, you might ask a reviewer to look at “segment 42.” Segment numbers are guaranteed to be accurate only for a single parsing of a file—what is segment 42 today might be segment 53 the next time the asset is parsed. Every segment will always have a segment number, even a markup segment that has no content.
Do not confuse the segment number with a segment identifier.
A segment identifier, or SID, is a label that defines the usage context in which a segment is to be translated. Instead of basing the usage context on surrounding segments, the usage context can be explicitly defined by applying a SID to the segment. SID support must be enabled for WorldServer to find SPICE matches.
To have a SID, your file type and your content have to be set up to support it. For more information about SIDs, see the Translation Memory Administration Guide