For further technical details on how these seasons are coded, you can explore the eBIZ/MODA-ML Implementation Guides .
: To specify which seasonal collection a particular fabric belongs to.
: Within these XML files, the tag 32019 is used as a temporal qualifier for technical sheets, order requests, and despatch advices.
: To track raw material requests for a specific production window.
: To inform subcontractors about materials sent for a particular season's manufacturing.
You will typically find this "piece" of data in the following technical documents: