Keywords and descriptions are examples of HTML codes called ____ tags.

The most common type of relationship to set up is a(n) ____ relationship, in which the primary key field in one table is associated with multiple records in a second table.

A. one-to-one B. referential C. one-to-many D. integral

The first step in using extensions is to define an extension's namespace within the _____ element.

A. ?root B. ?stylesheet C. ?template D. ?output