### Kanji Dictionary Reference Types

Source: https://www.edrdg.org/kanjidic/kanjidic2_dtdh

Defines the types of dictionaries and reference books used for kanji. The `dr_type` attribute specifies the source, with examples including Nelson's dictionaries, Halpern's works, Heisig's method, and various other specialized kanji guides.

```XML
<!ATTLIST dic_ref dr_type CDATA #REQUIRED>
	<!-- 
	The dr_type defines the dictionary or reference book, etc. to which
	dic_ref element applies. The initial allocation is:
	  nelson_c - "Modern Reader's Japanese-English Character Dictionary",  
	  	edited by Andrew Nelson (now published as the "Classic" 
	  	Nelson).
	  nelson_n - "The New Nelson Japanese-English Character Dictionary", 
	  	edited by John Haig.
	  halpern_njecd - "New Japanese-English Character Dictionary", 
	  	edited by Jack Halpern.
	  halpern_kkld - "Kanji Learners Dictionary" (Kodansha) edited by 
	  	Jack Halpern.
	  heisig - "Remembering The  Kanji"  by  James Heisig.
	  gakken - "A  New Dictionary of Kanji Usage" (Gakken)
	  oneill_names - "Japanese Names", by P.G. O'Neill. 
	  oneill_kk - "Essential Kanji" by P.G. O'Neill.
	  moro - "Daikanwajiten" compiled by Morohashi. For some kanji two
	  	additional attributes are used: m_vol:  the volume of the
	  	dictionary in which the kanji is found, and m_page: the page
	  	number in the volume.
	  henshall - "A Guide To Remembering Japanese Characters" by
	  	Kenneth G.  Henshall.
	  sh_kk - "Kanji and Kana" by Spahn and Hadamitzky.
	  sakade - "A Guide To Reading and Writing Japanese" edited by
	  	Florence Sakade.
	  jf_cards - Japanese Kanji Flashcards, by Max Hodges and
		Tomoko Okazaki. (Series 1)
	  henshall3 - "A Guide To Reading and Writing Japanese" 3rd
		edition, edited by Henshall, Seeley and De Groot.
	  tutt_cards - Tuttle Kanji Cards, compiled by Alexander Kask.
	  crowley - "The Kanji Way to Japanese Language Power" by
	  	Dale Crowley.
	  kanji_in_context - "Kanji in Context" by Nishiguchi and Kono.
	  busy_people - "Japanese For Busy People" vols I-III, published
		by the AJLT. The codes are the volume.chapter.
	  kodansha_compact - the "Kodansha Compact Kanji Guide".
	  maniette - codes from Yves Maniette's "Les Kanjis dans la tete" French adaptation of Heisig.
	-->
```

--------------------------------

### KANJIDIC2 DTD Structure

Source: https://www.edrdg.org/kanjidic/kanjidic2_dtdh

Defines the root element 'kanjidic2' and its main child elements 'header' and 'character'. The header contains file and database version information, while each character element holds detailed Kanji data.

```XML
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE kanjidic2 [
	<!-- Version 1.6 - April 2008
	This is the DTD of the XML-format kanji file combining information from
	the KANJIDIC and KANJD212 files. It is intended to be largely self-
	documenting, with each field being accompanied by an explanatory
	comment.

	The file covers the following kanji:
	(a) the 6,355 kanji from JIS X 0208;
	(b) the 5,801 kanji from JIS X 0212;
	(c) the 3,693 kanji from JIS X 0213 as follows:
		(i) the 2,741 kanji which are also in JIS X 0212 have
		JIS X 0213 code-points (kuten) added to the existing entry;
		(ii) the 952 "new" kanji have new entries.

	At the end of the explanation for a number of fields there is a tag
	with the format [N]. This indicates the leading letter(s) of the
	equivalent field in the KANJIDIC and KANJD212 files.

	The KANJIDIC documentation should also be read for additional 
	information about the information in the file.
	-->
<!ELEMENT kanjidic2 (header,character*)>
<!ELEMENT header (file_version,database_version,date_of_creation)>
<!--
	The single header element will contain identification information
	about the version of the file 
	-->
<!ELEMENT file_version (#PCDATA)>
<!--
	This field denotes the version of kanjidic2 structure, as more
	than one version may exist.
	-->
<!ELEMENT database_version (#PCDATA)>
<!--
	The version of the file, in the format YYYY-NN, where NN will be
	a number starting with 01 for the first version released in a
	calendar year, then increasing for each version in that year.
	-->
<!ELEMENT date_of_creation (#PCDATA)>
<!--
	The date the file was created in international format (YYYY-MM-DD).
	-->
<!ELEMENT character (literal,codepoint, radical, misc, dic_number?, query_code?, reading_meaning?)*>
<!ELEMENT literal (#PCDATA)>
<!--
	The character itself in UTF8 coding.
	-->
<!ELEMENT codepoint (cp_value+)>
```

--------------------------------

### KANJIDIC XML: Reading and Meaning Structure

Source: https://www.edrdg.org/kanjidic/kanjidic2_dtdh

Outlines the structure for 'reading_meaning' elements in KANJIDIC XML, which group readings and meanings. It includes 'rmgroup' to associate readings with meanings and 'nanori' for name-specific readings.

```XML
<!ELEMENT reading_meaning (rmgroup*, nanori*)>
<!ELEMENT rmgroup (reading*, meaning*)>
<!ELEMENT nanori (#PCDATA)>
```

--------------------------------

### Codepoint Element and Attributes

Source: https://www.edrdg.org/kanjidic/kanjidic2_dtdh

Details the 'codepoint' element, which contains 'cp_value' elements for character codepoints. The 'cp_value' element has a 'cp_type' attribute to specify the coding standard (e.g., JIS, Unicode).

```XML
<!-- 
	The codepoint element states the code of the character in the various
	character set standards.
	-->
<!ELEMENT codepoint (cp_value+)>
	<!-- 
	The cp_value contains the codepoint of the character in a particular
	standard. The standard will be identified in the cp_type attribute.
	-->
<!ELEMENT cp_value (#PCDATA)>
	<!-- 
	The cp_type attribute states the coding standard applying to the
	element. The values assigned so far are:
		jis208 - JIS X 0208-1997 - kuten coding (nn-nn)
		jis212 - JIS X 0212-1990 - kuten coding (nn-nn)
		jis213 - JIS X 0213-2000 - kuten coding (p-nn-nn)
		ucs - Unicode 4.0 - hex coding (4 or 5 hexadecimal digits)
	-->
<!ATTLIST cp_value cp_type CDATA #REQUIRED>
```

--------------------------------

### Kanji Query Code Types

Source: https://www.edrdg.org/kanjidic/kanjidic2_dtdh

Specifies the types of query codes used for finding kanji, based on their glyphs. Supported types include Halpern's SKIP system, Spahn and Hadamitzky's descriptor codes, and the Four Corner code.

```XML
<!ATTLIST q_code qc_type CDATA #REQUIRED>
	<!-- 
	The qc_type attribute defines the type of query code. The current values
	are:
	  skip -  Halpern's SKIP (System  of  Kanji  Indexing  by  Patterns) 
	  	code. The  format is n-nn-nn.  See the KANJIDIC  documentation 
	  	for  a description of the code and restrictions on  the 
	  	commercial  use  of this data. [P]  There are also
		a number of misclassification codes, indicated by the
		"skip_misclass" attribute.
	  sh_desc - the descriptor codes for The Kanji Dictionary (Tuttle 
	  	1996) by Spahn and Hadamitzky. They are in the form nxnn.n,  
	  	e.g.  3k11.2, where the  kanji has 3 strokes in the 
	  	identifying radical, it is radical "k" in the SH 
	  	classification system, there are 11 other strokes, and it is 
	  	the 2nd kanji in the 3k11 sequence. (I am very grateful to 
	  	Mark Spahn for providing the list of these descriptor codes 
	  	for the kanji in this file.) [I]
	  four_corner - the "Four Corner" code for the kanji. This is a code 
	  	invented by Wang Chen in 1928. See the KANJIDIC documentation 
	  	for  an overview of  the Four Corner System. [Q] 

	  deroo - the codes developed by the late Father Joseph De Roo, and 
	  	published in  his book "2001 Kanji" (Bonjinsha). Fr De Roo 
	-->
```

--------------------------------

### Frequency of Use Ranking

Source: https://www.edrdg.org/kanjidic/kanjidic2_dtdh

Describes the 'freq' element, which provides a frequency-of-use ranking for Kanji. Only the 2,500 most-used characters have a ranking, indicated by a number from 1 to 2,500.

```XML
<!ELEMENT freq (#PCDATA)>
	<!-- 
	A frequency-of-use ranking. The 2,500 most-used characters have a 
	ranking; those characters that lack this field are not ranked. The 
	frequency is a number from 1 to 2,500 that expresses the relative 
```

--------------------------------

### Variant Kanji Information

Source: https://www.edrdg.org/kanjidic/kanjidic2_dtdh

Explains the 'variant' element, used for cross-references to other Kanji or alternative indexing codes. The 'var_type' attribute specifies the type of variant, such as JIS codings, De Roo numbers, or Unicode.

```XML
<!-- 
	Either a cross-reference code to another kanji, usually regarded as a 
	variant, or an alternative indexing code for the current kanji.
	The type of variant is given in the var_type attribute.
	-->
<!ELEMENT variant (#PCDATA)>
	<!-- 
	The var_type attribute indicates the type of variant code. The current
	values are: 
		jis208 - in JIS X 0208 - kuten coding
		jis212 - in JIS X 0212 - kuten coding
		jis213 - in JIS X 0213 - kuten coding
		  (most of the above relate to "shinjitai/kyuujitai" 
		  alternative character glyphs)
		deroo - De Roo number - numeric
		njecd - Halpern NJECD index number - numeric
		s_h - The Kanji Dictionary (Spahn & Hadamitzky) - descriptor
		nelson_c - "Classic" Nelson - numeric
		oneill - Japanese Names (O'Neill) - numeric
		ucs - Unicode codepoint- hex
	-->
<!ATTLIST variant var_type CDATA #REQUIRED>
```

--------------------------------

### Miscellaneous Kanji Information

Source: https://www.edrdg.org/kanjidic/kanjidic2_dtdh

Details the 'misc' element, which can contain various pieces of information about a Kanji, including grade, stroke count, variants, frequency, radical names, and JLPT level.

```XML
<!ELEMENT misc (grade?, stroke_count+, variant*, freq?, rad_name*,jlpt?)>
```

--------------------------------

### KANJIDIC XML: Meaning Element Attributes

Source: https://www.edrdg.org/kanjidic/kanjidic2_dtdh

Details the 'meaning' element in KANJIDIC XML, highlighting the 'm_lang' attribute used to specify the language of the meaning, defaulting to English if not provided.

```XML
<!ELEMENT meaning (#PCDATA)>
<!ATTLIST meaning m_lang CDATA #IMPLIED>
```

--------------------------------

### KANJIDIC XML: Reading Element Attributes

Source: https://www.edrdg.org/kanjidic/kanjidic2_dtdh

Defines the 'reading' element in KANJIDIC XML, specifying its attributes like 'r_type' to denote the type of reading (e.g., pinyin, Korean, Japanese On/Kun) and 'on_type'/'r_status' for further classification.

```XML
<!ATTLIST reading r_type CDATA #REQUIRED>
<!ATTLIST reading on_type CDATA #IMPLIED>
<!ATTLIST reading r_status CDATA #IMPLIED>
```

--------------------------------

### Radical Element and Attributes

Source: https://www.edrdg.org/kanjidic/kanjidic2_dtdh

Describes the 'radical' element, which includes 'rad_value' elements for radical numbers. The 'rad_value' element has a 'rad_type' attribute specifying the classification system (e.g., classical, Nelson).

```XML
<!ELEMENT radical (rad_value+)>
<!ELEMENT rad_value (#PCDATA)
	<!-- 
	The radical number, in the range 1 to 214. The particular
	classification type is stated in the rad_type attribute.
	-->
<!ATTLIST rad_value rad_type CDATA #REQUIRED>
	<!-- 
	The rad_type attribute states the type of radical classification.
		classical - as recorded in the KangXi Zidian.
		nelson_c - as used in the Nelson "Modern Japanese-English 
		Character Dictionary" (i.e. the Classic, not the New Nelson).
		This will only be used where Nelson reclassified the kanji.
	-->
```

--------------------------------

### KANJIDIC XML: Misclassification Attribute

Source: https://www.edrdg.org/kanjidic/kanjidic2_dtdh

Describes the 'skip_misclass' attribute for the 'q_code' element in KANJIDIC XML, which indicates the type of misclassification for a kanji, such as positional or stroke count errors.

```XML
<!ATTLIST q_code skip_misclass CDATA #IMPLIED>
```

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