Because a DTD is not written in the XML language, XML ____________________ must support the syntax and language requirements needed to interpret DTD code.

A(n) _____ is a short text string that the form developer displays on the form message line.

Fill in the blank(s) with the appropriate word(s).

When a loop rejects any input except the strings "yes" and "no" it is performing a case-__________ comparison.

Fill in the blank(s) with the appropriate word(s).