fancy_lists with Chinese numerals

fancy_lists with Chinese numerals

[Kolen Cheung]

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Would [Chinese numerals](https://en.wikipedia.org/wiki/Chinese_numerals) be 
considered to be added as a variants of fancy_lists?

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Re: fancy_lists with Chinese numerals

[BP Jonsson]

Den 2016-12-20 kl. 02:28, skrev Kolen Cheung:
> Would [Chinese numerals](https://en.wikipedia.org/wiki/Chinese_numerals) be 
> considered to be added as a variants of fancy_lists?
> 

There are some complexities involved:

*   There are dozens of numeral systems in use, all of which have an at least in principle equal claim to be supported: 

    <https://en.wikipedia.org/wiki/Template:Numeral_systems>

*   Systems that are supported by pandoc need to be supported by pandoc's target formats, and in a non-broken way:

    <https://github.com/jgm/pandoc/issues/1243>

    (With a general fix for HTML/CSS: <https://github.com/jgm/pandoc/issues/1243#issuecomment-138061181>)

*   Pandoc will need to be able to convert those numbers into ASCII decimals to determine the list start number.
    There are libraries which can do that <http://billposer.org/Software/libuninum.html>, but as you will see from the previous point the boundary between letters and numbers can be hard to detect.

*   There is also alphabetical (or similar) list marking in use in dozens of scripts, which not always use letters in their Unicode order.
    I have looked and apparently there are no libraries which support these.

FWIW I tried to come up with at least a hack which would work in LaTeX using perltex and Unicode::Number which wraps libuninum.
It was too hard even without considering LaTeX as produced by pandoc.

/bpj

Re: fancy_lists with Chinese numerals

[John MacFarlane]

+++ Kolen Cheung [Dec 19 16 17:28 ]:
>   Would [Chinese
>   numerals](https://en.wikipedia.org/wiki/Chinese_numerals) be considered
>   to be added as a variants of fancy_lists?

I don't see why not.  I don't know anything about how
Chinese numerals work, though; perhaps you could explain?

Re: fancy_lists with Chinese numerals

[Kolen Cheung]

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Concerning only Natural numbers, and Traditional Chinese only 
(generalzation to simplified Chinese is trivial by the mapping: 萬 [image: 
\mapsto] 万, 億 [image: \mapsto] 亿):

   - 
   
   digitizing rule:
   1. 
      
      digit: [image: 1, \ldots, 9 =] 一, 二, 三, 四, 五, 六, 七, 八, 九
      2. 
      
      powers of 10: [image: 10^1, 10^2, 10^3 =] 十, 百, 千
      3. 
      
      powers of [image: 10^4]: [image: 10^4, 10^8, 10^{12},\ldots =] 萬, 億, 
      兆,…
      - 
   
   decompositional rule: For any given number, decompose by powers of [image: 
   10^4] first, then further decompose each of them into powers of [image: 
   10], lastly, convert each digit.
   - 
   
   exceptions:
   1. 
      
      zeros: [image: 0] is 零:
      1. 
         
         one 零 will be inserted whenever a consecutive numbers of [image: 0] 
         exists. e.g. [image: 1001] will only has one 零 between.
         2. 
         
         零 is not inserted when it is at the end.
         2. 
      
      [image: 10,...19] will not have 一 at the beginning.
      
<#>Example 1: 10,091,009 
   
   1. 3rd digitizing rule: 1009萬1009 
   2. 2nd digitizing rule: 1千9萬1千9 
   3. 1st digitizing rule: 一千九萬一千九 
   4. exceptions 1.1: insert 零: 一千零九萬一千零九 

<#>Example 2: 17 
   
   1. 2nd digitizing rule: 1十7 
   2. 1st digitizing rule: 一十七 
   3. exceptions 2: 十七 

<#>Example 3: 1,017 
   
   1. 2nd digitizing rule: 1千1十7 
   2. 1st digitizing rule: 一千一十七 
   3. exceptions 1.1 (note exception 2 does not apply): 一千零一十七 

<#>Example 4: 200 
   
   1. 2nd digitizing rule: 2百 
   2. 1st digitizing rule: 二百 
   3. exceptions 1.2: no 零 is inserted at the end: 二百 

On Tuesday, December 20, 2016 at 1:28:32 PM UTC-8, John MacFarlane wrote:

+++ Kolen Cheung [Dec 19 16 17:28 ]: 
> >   Would [Chinese 
> >   numerals](https://en.wikipedia.org/wiki/Chinese_numerals) be 
> considered 
> >   to be added as a variants of fancy_lists? 
>
> I don't see why not.  I don't know anything about how 
> Chinese numerals work, though; perhaps you could explain? 
>
​

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Re: fancy_lists with Chinese numerals

[Kolen Cheung]

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Another related suggestion is custom bullet: at least it seems possible to write a filter targetting HTML related and LaTeX outputs, with a custom syntax using pandoc span for the bullet text. If this is implemented into pandoc, it will partially solve the issues @bpj referred to, albeit with an uglier syntax, say, `[一、]{.list}a list with bullet 一、`. This also solves a problem with the puntuation mark used in different language. e.g. In Chinese, it would be `、` or `（）` rather than `.` and `()`. 

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