You may want to separate other schemata (e.g. XHTML, UBL, etc.) from your schemata.

Version numbers in file or directory names is a double-edged sword:

• If you have version numbers, it is obvious which version you are using.

• When you change versions, you may have to modify the schemaLocation pointers in your schemata.

Always separate other people's schemata that have multiple schema documents:

• Use different directories so that you don't have file name collisions.

• Subdirectories are great when you want to bundle the other schemata.

• Sibling directories are better when your schemata augment other existing schemata.