CH-LanguagesCharacterSets.xml
/div/div[1]/p[1]/list[1]/item[2]
The value of the attribute <att>xml:lang</att> identifies the language using a coded value. For maximal compatibility with existing processes, modelling this value in the following way is recommended (this parallels the modelling of <att>xml:lang</att>):
Comment: This is circular: "this value" should probably refer to <langUsage>.
Thank you for the report. You're quite right, this is off. But it's worse than you think. At first blush: