13.7 The PGPData Element

The PGPData element appears as a child of KeyInfo. It conveys information that relates to PGP public key pairs and signatures on such keys. See Table 13-1 for its identifier. The PGPKeyID and PGPKeyPacket are prespecified children of PGPData.

A PGPKeyID value is a base64Binary sequence containing a standard PGP public key identifier, as defined in [RFC 2440]. The PGPKeyPacket contains a base-64 encoded Key Material Packet, also as defined in [RFC 2440]. Siblings from an external namespace can complement or extend these child element types. Alternatively, a PGP XML structure in an external namespace might replace PGPData as a child of KeyInfo. PGPData must contain one PGPKeyID and/or one PGPKeyPacket and may have zero or more elements from an external namespace.

Implementation of PGPData is optional. The PGPData element syntax follows:

 <!-- PGPData DTD --> <!ELEMENT PGPData ( (PGPKeyID, PGPKeyPacket?) |                     (PGPKeyPacket)                     %PGPData.ANY;) > <!ELEMENT PGPKeyPacket  (#PCDATA)  > <!ELEMENT PGPKeyID  (#PCDATA)  > 

In schema notation, it has the following form:

 <!-- PGPData schema --> <element name="PGPData" type="ds:PGPDataType"/> <complexType name="PGPDataType">   <choice>     <sequence>       <element name="PGPKeyID" type="base64Binary"/>       <element name="PGPKeyPacket" type="base64Binary"                minOccurs="0"/>       <any namespace="##other" processContents="lax"            minOccurs="0" maxOccurs="unbounded"/>     </sequence>     <sequence>       <element name="PGPKeyPacket" type="base64Binary"/>       <any namespace="##other" processContents="lax"            minOccurs="0" maxOccurs="unbounded"/>     </sequence>   </choice> </complexType>