Terminology for CJK coordination committee and IP (v1.1, 2015-07-16)

Background
~~~~~~~~~~
CGP, JGP, and KGP are collaborating to create Root zone LGR for CJK.  CJK
GPs' collaboration is not limited to among us, but also involving IP and
ICANN.  For the efficiency and the good progress, we should have common
terminology definition for key concepts.

Terminology
~~~~~~~~~~~
(1) Script

  Based on Unicode, script is a collection of letters and other written signs
  used to represent textual information in one or more writing systems.
  Ex. Han, Hiragana, Katakana and Hangul.

(2) Chinese script, Japanese script, Korean script

  Script(s) used in the language.  Chinese script is Han, Japanese script is a
  mixture of Han, Hiragana and Katakana, and Korean script is a mixture of Han
  and Hangul.

  In Root zone LGR context, Chinese script, Japanese script and Korean script
  are equivalent to und-Hani, und-Jpan and und-Kore respectively.  Here, Hani,
  Jpan and Kore are terms from ISO 15924.

(3) Disposition

  Result of whole label evaluation (WLE). Disposition is assigned to a label,
  not to a character. In general, the Root zone process only allows the two
  dispositions 'allocatable' and 'blocked' (as well as 'invalid' for labels
  that are not valid at all). It is not possible to add new dispositions for
  labels other than 'allocatable', 'blocked' and 'invalid'. Label disposition
  assigned as a result of WLE cannot be reassigned.

(4) Variant type, variant subtype

  Variant type is an attribute of a code point, which indicates the treatment
  of the variant in WLE rules and actions.  Default variant type is one of 
  (A) allocatable, (B) blocked, and (C) out of repertoire var.  A variant
  subtype is a variation of variant type with certain limitation.  For
  example, in the Chinese script LGR, variant type "allocatable" is
  substituted by "simp" (stands for simplified), "trad" (stands for
  "traditional") and "both" (stands for both simplified and traditional)
  subtypes.  The variant subtype can be defined by each GP.  Each variant type
  and variant subtype has to have one or more corresponding <action> elements
  in WLE.

(5) LGR-alpha

  LGR-alpha designates the LGR defined by each GP for CJK integration
  purposes.  Each CJK GP can define its LGR-alpha independently from each
  other.  The LGR-alpha must consist of language tag (one of und-Hani,
  und-Jpan, and und-Kore), repertoire of allowed characters for applied-for
  label, variants of each character where variant type (and variant subtype if
  necessary) is associated with each variant characters, and WLE.  The variant
  type must not have gout of repertoire varh.  The LGR-alpha is an
  intermediate product and it is not a final proposal of each GP.  The
  development of LGR-alpha can be iterative (cyclic).  Once CJK GPs generate
  each LGR-beta, each GP assess it and modify LGR-alpha if necessary.  This
  cycle can be repeated until all CJK GPs get conclusion.

(6)	LGR-beta

  LGR-beta designates the LGR generated by LGR-alpha integration process.  The
  LGR-beta is generated for each Chinese/Japanese/Korean script.  The
  differences between each LGR-beta are (A) language tag, (B) repertoire, and
  (C) variant type (including variant subtype) of each variant.  The set of
  variants and WLE are common between LGR-betas.  Once each CJK GP has
  concluded their LGR-alpha, the generated LGR-beta is incorporated into the
  final LGR proposal from each of them.