RFC 2938 (rfc2938) - Page 2 of 18
Identifying Composite Media Features
Alternative Format: Original Text Document
RFC 2938 Identifying Composite Media Features September 2000 9. Authors' Addresses .........................................15 10. Appendix A: The birthday paradox ...........................16 11. Full Copyright Statement ...................................18 1. Introduction In "A Syntax for Describing Media Feature Sets" [1], an expression format is presented for describing media feature capabilities as a combination of simple media feature tags [2]. This document proposes an abbreviated format for a composite media feature set, based upon a hash of the feature expression describing that composite. This memo extends and builds upon the expression syntax described in RFC 2533 [1], and it is assumed that the reader is familiar with the interpretation of feature set expressions described there. 1.1 Organization of this document Section 2 sets out some of the background and goals for feature set references. Section 3 presents a syntax for feature set references, and describes how they are related to feature set expressions. 1.2 Terminology and document conventions This section defines a number of terms and other document conventions, which are used with specific meaning in this memo. The terms are listed in alphabetical order. dereference the act of replacing a feature set reference with its corresponding feature set expression. Also called "resolution". feature set some set of media features described by a media feature assertion, as described in "A Syntax for Describing Media Feature Sets" [1]. (See that memo for a more formal definition of this term.) feature set expression a string that describes some feature set, formulated according to the rules in "A Syntax for Describing Media feature sets" [1] (and possibly extended by other specifications). Klyne & Masinter Standards Track
