xpmmetaset
This sets values for one or more metadata keys.
xpmmetaset xpmId key VALUE ?key2 VALUE2 ...?
This command modifies the default metadata that is inherited by messages
produced by xpmId
.
This command returns an empty string.
Manipulating data
You can manipulate metadata in the Translation tool, so that an xlate can configure HTTP headers/URL and modify DRIVERCTL during xlate.
This, and other metadata fields, is accessed in xlate using the xpmmetaget and xpmmetaset commands.
Example:
set udata [xpmmetaget $xlateId USERDATA]