Names of the elements are written in uppercase letters (for example, SAPI:COMMENTS). Names of the attributes are written in lowercase letters (for example, title). Please note that in SAPI the names of elements and attributes are not case-sensitive. The convention is meant to encourage readability.

Element and attribute names in this document have been marked up and may be rendered specially by some user agents.

Each attribute definition specifies the type of its value. If the type allows a small set of possible values, the definition lists the set of values separated by a bar (|).

After the type information, each attribute definition indicates the case-sensitivity of its values in square brackets ("[]"). See Case Information for details.