ISO/IEC 11694-5:2014 識別カード—光メモリカード—線形記録方法—パート5：ISO / IEC11694-4を使用するアプリケーションの情報交換のためのデータ形式 | ページ 6

3.1

application

computer application program which writes to or makes use of the data read from an optical memory card

Note 1 to entry: This also applies more generally to a system that makes use of the card or the way the card is used.

3.2

data element

set of data bytes that is only useful in its entirety

3.3

data file

a stream of bytes which is referenced by a single entry in the card’s directory

Note 1 to entry: A data file can contain either a single data item (associated with a single tag) or a TLV stream having multiple data items.

3.4

data item

data element or well-defined set of data elements that is associated with a single tag, which defines its meaning and layout

3.5

data sector

sector (as defined in ISO/IEC 11694-4) that contains all or part of a data file

3.6

directory

structure used to keep track of the presence and location of data on a random access storage media

3.7

directory sector

sector on a random access media that contains directory information

3.8

layout

specific sequence of bytes required in the data item

Note 1 to entry: This is in contrast to the meaning of the data item, which describes its use.

3.9

little-endian format

format for defining the order of bytes in a multi-byte number

Note 1 to entry: This format is sometimes referred to as “Intel” format. The first byte of a multi-byte number contains the least significant byte of the number, and the last byte contains the most significant byte of the number.

3.10

logical track

sequence of bytes, the length of which is the data capacity of a track, which make up part of a file

3.11

meaning

use to which the data item can be put

3.12

physical track

track on the optical memory stripe that is referenced by a physical track address as defined in ISO/IEC 11694-4

3.13

public zone

part of the optical stripe on the card that is accessible to all optical card drives

Note 1 to entry: Optical memory cards can also contain a private zone that is accessible to only a specific set of card drives operated by the card issuer.

3.14

tag

unique unsigned 16-bit number in the range 0 through 65535 (inclusive) that is used to identify a data item stored on the card

Note 1 to entry: A single set of tags applies to any and all data stored in the pubic zone of an optical memory card that conforms to this part of ISO/IEC 11694.

3.15

tag document

document that completely describes both the meaning and the layout of one or more data items associated with a tag or a numerically contiguous group of tags

Note 1 to entry: This document is created by the body which wishes to issue or update cards and is submitted to the tag issuing body for publication. An organization that desires to create or read and use the described data item(s) shall be able to do so by reading the tag document and any references incorporated in the tag document.

3.16

tag issuing body

organization responsible for issuing tags to organizations which wish to issue or update cards complying with this part of ISO/IEC 11694

Note 1 to entry: The tag issuing body maintains a list of tags to ensure that each tag corresponds to a unique type of data item and publishes tag documents which describe the meaning and layout of the data associated with each tag. It is proposed that HID Global be the tag issuing body for ISO/IEC 11694-5.

3.17

tag, length, value (TLV) data stream

data storage structure that involves placing multiple data items in serial fashion on a storage medium and keeping track of these items through a tag

Note 1 to entry: The tag identifies the meaning and layout of the data, followed by the length of the data in bytes, followed by the value, which is the data itself. The last byte of the “value” part is then optionally followed by another TLV structure within the stream. The stream is terminated by a “tag” of zero. Although such a data stream is a serial entity, a random access technology can contain any number of such streams, and parts of a TLV stream can be read independently if desired. Each TLV data stream is contained in a file that is referenced by a single entry in the card’s directory.

3.18

track

physical location on an optical memory card that can contain one or more sectors

Note 1 to entry: This term is the same as the term “physical track” and is defined in ISO/IEC 11694-4.

3.19

unique stamp

unique 12-byte value that is created based on the time of writing and the unique serial number of the optical memory card writing device

Note 1 to entry: This stamp is used to identify two separate sectors as containing parts of the same data file.