Wavecom W-RCI (Remote Control) V8.7.0 - Manual (Page 77)

XML SDK V8.7.0 Remote Control Interface Glossary of Terms
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Glossary of Terms
base16
Scheme used to transmit binary data. The hexadecimal number system is a base-16 numbering system. It
is the numbering system used to condense binary bytes into a compact form for transmitting or analysis
of computer data. It is composed of the numbers 0-9 and the letters A-F. Each “nibble” (4 bits) of a byte
can be represented by one of the 16 digits.
base2
Scheme used to transmit binary data. Every binary bit is represented as a character of “0” or “1”. The da-
ta volume grows by factor 8, i.e., for every binary byte, a character string of 8 bytes is generated.
base64
Scheme used to transmit binary data. Base64 processes data as 24-bit groups, mapping this data to four
encoded characters. It is sometimes referred to as 3-to-4 encoding. Each 6 bits of the 24-bit group is used
as an index into a mapping table (the base64 alphabet) to obtain a character for the encoded data.
base64-mime
Scheme used to transmit binary data. Same principle as base64 with one little difference, it’s the way how
the ends of the encoded strings looks like. Both techniques use the same character set but base64-mime
follows the specification made for SMTP messages. It aligns the string to 4 characters and fills the unused
with the padding character “=”, base64 cuts down the characters to the only needed ones depending on
the number of bits.
DTD
Can accompany a document, essentially defining the rules of the document, such as which elements are
present and the structural relationship between the elements. It defines what tags can go in a XML docu-
ment, what tags can contain other tags, the number and sequence of the tags, the attributes a tag can
have, and optionally, the values those attributes can have.
RGB
A color perceived by the human eye can be defined by a linear combination of the three primary colors
red, green and blue. These three colors form the basis for the RGB-colorspace.
Unicode
Unicode is a character code that defines every character in most of the speaking languages in the world.
Although commonly thought to be only a two-byte coding system, Unicode characters can use only one
byte, or up to four bytes, to hold a Unicode "code point" (see UTF-8 and UTF-16). The code point is a
unique number for a character or some character aspect such as an accent mark or ligature. Unicode sup-
ports more than a million code points, which are written with a "U" followed by a plus sign and the number
in hex; for example, the word "Hello" is written U+0048 U+0065 U+006C U+006C U+006F.
UTF-16
This is a fixed-length character encoding for unicode. It is able to represent any universal character in the
Unicode standard. UTF-16 uses two bytes per character.