(RFC 3073 published March 2001, subtype last updated March 2001) MIME media type name: application MIME subtype name: font-tdpfr Required parameters: none Optional parameters: none Encoding considerations: Binary or base 64 required Security considerations: PFR uses a structure that can store glyph image data and encoding arrays. The fields defined in the PFR specification are of a descriptive nature and provide information that is useful to facilitate viewing and rendering of glyph images by a recipient. As such, the fields currently defined in the PFR specification do not in themselves create additional security risks, since the fields are not used to induce any particular behavior by the recipient application. PFR has an extensible structure, so that it is theoretically possible that fields could be defined in the future which could be used to induce particular actions on the part of the recipient, thus presenting additional security risks, but this type of capability is not supported in the referenced PFR specification. Indeed, the definition of fields that would include such processing instructions is inconsistent with the goals and spirit of the PFR specification. Interoperability considerations: none Published specification: The specification for this content type is available on request from: Bitstream Inc. 215 First Street Cambridge MA 02142 U.S.A. Phone: +1 617 497 6222 Fax: +1 617 868 0784 A copy of this specification can also be found at: http://www.bitstream.com/pfrspec/index.html Applications which use this media type: Netscape Communicator, Bitstream WebFont Maker, Hexmac Typograph Additional information: None Magic number(s): 50 46 52 30 hex File extension(s): PFR Macintosh File Type Code(s): Creator: 'b$pw' Type: 'PFR ' Person to contact for further information: "John Collins" Intended usage: common Author/Change controller: "John Collins"