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1.1 Glossary

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This document uses the following terms:

ANSI character: An 8-bit Windows-1252 character set unit.

ARGB: A color space wherein each color is represented as a quad (A, R, G, B), where A represents the alpha (transparency) component, R represents the red component, G represents the green component, and B represents the blue component. The ARGB value is typically stored as a 32-bit integer, wherein the alpha channel is stored in the highest 8 bits and the blue value is stored in the lowest 8 bits.

ASN.1: Abstract Syntax Notation One. ASN.1 is used to describe Kerberos datagrams as a sequence of components, sent in messages. ASN.1 is described in the following specifications: [ITUX660] for general procedures; [ITUX680] for syntax specification, and [ITUX690] for the Basic Encoding Rules (BER), Canonical Encoding Rules (CER), and Distinguished Encoding Rules (DER) encoding rules.

AYCoCg: A color space in which each color is represented as a quad (A, Y, Co, Cg), where A represents the alpha (transparency) component, Y represents the luma (intensity) component, and Co and Cg represent the two chrominance (color) components orange and green, respectively.

brush: An 8-by-8-pixel bitmap that is repeated horizontally and vertically to fill an area.

client: A computer on which the remote procedure call (RPC) client is executing.

color plane: A two-dimensional surface containing a collection of values that represent a single component of the ARGB or AYCoCg color space.

color space: Any method of representing colors for printing or electronic display.

Packed Encoding Rules (PER): A set of encoding rules for ASN.1 notation, specified in [ITUX691]. These rules enable the identification, extraction, and decoding of data structures.

protocol data unit (PDU): Information that is delivered as a unit among peer entities of a network and that can contain control information, address information, or data. For more information on remote procedure call (RPC)-specific PDUs, see [C706] section 12.

red-green-blue (RGB): A color model that describes color information in terms of the red (R), green (G), and blue (B) intensities in a color.

Reverse Polish Notation (RPN): A mathematical notation wherein each operator follows all of its operands. Also known as postfix notation.

screen tearing: A phenomenon in video rendering where a newly rendered frame partially overlaps with a previously rendered frame, creating a torn look as graphical objects do not line up.

server: A computer on which the remote procedure call (RPC) server is executing.

Unicode character: Unless otherwise specified, a 16-bit UTF-16 code unit.

YCoCg: A color space wherein each color is represented as a triple (Y, Co, Cg), where Y represents the luma (intensity) component, and Co and Cg represent the two chrominance (color) components orange and green, respectively.

MAY, SHOULD, MUST, SHOULD NOT, MUST NOT: These terms (in all caps) are used as defined in [RFC2119]. All statements of optional behavior use either MAY, SHOULD, or SHOULD NOT.