Add in-depth instructions for download tool
Add instructions on what steps the utility specifically takes when
downloading and extracting the XSD files.
@@ -34,6 +34,20 @@ If --copy-from is used without --no-download, artfacts will be copied from
the directory provided via --copy-from and any missing artifacts will be
downloaded as usual.
+IN DEPTH
+========
+
+This utility downloads GS1 schemas from the following URL:
+
+https://www.gs1.org/docs/EDI/xml/3.4.1/GS1\_XML\_3-4-1\_Publication.zip
+
+It places the file in a cache directory GRID\_CACHE\_DIR/xsd\_artifact\_cache
+after validating the hash against a known good hash. The utility proceeds to
+read the zip in the following manner: It finds a zip file within the root zip
+beginning with "BMS Packages EDI XML", and then finds a zip file within that
+zip beginning with "BMS\_Package\_Order\_". This file's contents are then
+extracted to GRID\_STATE\_DIR/xsd/po.
+
FLAGS
=====
