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* 仕様書

[REFS[
- [1] [CITE[5014.[[CMap]]_[[CIDFont]]_Spec.book - 5014.CIDFont_Spec.pdf]], [TIME[2021-02-18T01:31:12.000Z]], [TIME[2022-09-27T13:47:42.463Z]] <https://adobe-type-tools.github.io/font-tech-notes/pdfs/5014.CIDFont_Spec.pdf#page=41>
- [6] [CITE[Adobe Tech Note #5099 (Developing [[CMap]] Resources for CID-Keyed Fonts) - 5099.CMapResources.pdf]], [TIME[2021-02-18T01:31:12.000Z]], [TIME[2022-09-29T14:44:04.077Z]] <https://adobe-type-tools.github.io/font-tech-notes/pdfs/5099.CMapResources.pdf>
]REFS]

* 書字方向

[SEE[ [[書字方向依存グリフ]] ]]

* PDF 写像資源

[2] 
[CITE@en[[[GitHub]] - adobe-type-tools/mapping-resources-pdf: Mapping Resources for PDF]], [TIME[2022-09-29T13:08:30.000Z]] <https://github.com/adobe-type-tools/mapping-resources-pdf>

>While both types of resources share the same file structure and syntax, they have very different functions. CMap resources unidirectionally map character codes, such as Unicode, to CIDs (Character IDs). Mapping resources for PDF have a variety of functions, such as mapping CIDs to character codes, or mapping character codes to other character codes.

*関連

[4] [[Adobe CID]]

[3] 
[[TrueType]] の [CODE[cmap]] と
[[CIDFont]] の [[CMap][CMap file]]
は、
似たような用途ですが、
技術的にはまったくの別物です。
正式な表記は[[大文字と小文字]]で区別できますが、
俗に
cmap, CMAP, CMap 
と混用されているので、文脈で注意して区別するしかありません。

* メモ

[7] 
[CITE@en[[[GitHub]] - adobe-type-tools/cmap-resources: CMap Resources]], [TIME[2022-09-30T07:36:31.000Z]] <https://github.com/adobe-type-tools/cmap-resources/>

[5] [CITE@en-US[To UVS, Or Not To [[UVS]]]], [TIME[2020-11-19T06:22:34.000Z]], [TIME[2022-09-29T13:18:56.409Z]] <https://ccjktype.fonts.adobe.com/2019/05/to-uvs-or-not-to-uvs.html>

[8] [CITE@en[Use of /CMapVersion to reflect incompatible changes · Issue #14 · adobe-type-tools/cmap-resources · GitHub]], [TIME[2023-06-29T01:58:02.000Z]] <https://github.com/adobe-type-tools/cmap-resources/issues/14>

[9] [CITE@en[validating supplement number of predefined CMaps · Issue #77 · pdf-association/pdf-issues · GitHub]], [TIME[2023-06-29T02:02:08.000Z]] <https://github.com/pdf-association/pdf-issues/issues/77>

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