This simple type specifies the possible classes of cryptographic algorithm used by protection. [Note: The initial version of this Office Open XML Standard only supports a single version - hash - but future versions may expand this as necessary. end note]

[Example: Consider a PresentationML document with the following information stored in its protection element:

<p:… p:cryptAlgorithmClass="hash"
p:cryptAlgorithmType="typeAny"
p:cryptAlgorithmSid="1"
p:hashData="9oN7nWkCAyEZib1RomSJTjmPpCY=" />

The cryptAlgorithmClass attribute value of hash specifies that the algorithm used for the password is a hashing algorithm. end example]

This simple type's contents are a restriction of the XML Schema string datatype.

The following are possible enumeration values for this type:

The following XML Schema fragment defines the contents of this simple type:

<simpleType name="ST_AlgClass">

   <restriction base="xsd:string">

   <enumeration value="hash"/>

   <enumeration value="invalid"/>

   </restriction>

</simpleType>