[Neobrahmigp] [lgr] RootLGR questions

[Yoshiro YONEYA]

Dear IP members and RootLGR staff,

I have two questions regarding RootLGR.

(1) Why mixing Japanese scripts and alphabet is denied 
    in RootLGR?

  During RoogLGR Workshop on Oct 15th, I asked that if
  Japanese rule can consist from jpan(hani+hira+kata) +
  alphabet.  The answer from Asmus was "No", but I couldn't
  get the reason at that time.  Would you please give me the
  reason why jpan + alphabet (latn) can't mix?

(2) How does language tag work in RootLGR?

  Language LGR specifies its language tag as <language>
  element.  How does it work in RootLGR?  For example, 
  if CGP defined variants for U+767C and U+73FE as follows:

  <language>und-Hani</language>
  <char cp="767C" tag="sc:Hani">
    <var cp="53D1" type="simp" />
    <var cp="5F42" type="block" />
    <var cp="767C" type="trad" comment="identity" />
    <var cp="9AEA" type="block" />
    <var cp="9AEE" type="block" />
  </char>
  <char cp="73FE" tag="sc:Hani">
    <var cp="73B0" type="simp" />
    <var cp="73FE" type="trad" comment="identity" />
  </char>

  and if JGP defined variants for U+7670 and U+73FE as follows:

  <language>unt-Jpan</language>
  <char cp="767C" tag="sc:Jpan">
    <var cp="767C" type="alloc" comment="identity" />
    <var cp="767A" type="alloc" />
  </char>
  <char cp="73FE" tag="sc:Jpan">
    <var cp="73FE" type="alloc" comment="identity" />
  </char>

  How does integrated RootLGR look like?  How does language
  tag in RootLGR work to generate variant labels?  I assume 
  that if an applicant applied-for U+767C U+73FF as und-Hani, 
  allocatable variant labels are U+767C U+73FE and U+53D1 U+73B0, 
  and blocked variant labels are others.  On the other hand, 
  I assume that if an applicant applied-for U+767C U+73FF as 
  und-Jpan, allocatable variant labels are U+767C U+73FE and 
  U+767A U+73FE, and blocked variant labels are others.
  I read draft-davies-idntables-08, but I couldn't understand 
  how to merge two LGRs into one LGR, and how to select variants 
  depend on language tag.

Regards,

-- 
Yoshiro YONEYA <yoshiro.yoneya at jprs.co.jp>

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