5.2 Non-schema-informed EXI

"5.2 Non-schema-informed EXI presently reads:

• • • • • 
          EXI can be used without any schema information about the XML infoset that shall be encoded. This has the advantage that no schema information is required at the decoders' site, but comes with the disadvantage of being less efficient and providing only a limited compression for small payloads.

I am not certain what could have been meant by ""can be used"" followed by ""that shall be encoded."" Nor does ""no schema information is required at the decoder's site"" follow from either not including or including the encoded XML infoset. Even more confusing is the last clause, which implies not sending information is ""less efficient and providing only a limited compression for small payloads."""