Page Schemas
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Info on using Page Schemas: So you could only need to make schemas for the different types of nodes that you'd want, so if i'm reading right then yes you would have several hundred pages but only 4-5 schemas.
A schema is defined (using page schemas) from a Category Page
A page is only ever loosely connected to a schema (rather than strictly, ie. can only have/requires the schema's fields) through its categ