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fix link to register command
< [[Structurals]] | [[References]] > (It's also in the manual at "Registers")
 
=Basics=
Putting a word into the index Use indexes as simple as <cmd>index</cmd><tt>{word}</tt>. (Always type <cmd>index</cmd> ''before'' the word you refer to!)follows:
* To sort e.g. add the word "word", use: {{cmd|index}}<cmdtt>ConTeXt{word}</cmdtt> * To sort a word (such as "ConTeXt" under "C"), you write use: {{cmd|index}}<tt>[CONTEXT]{\ConTeXt}</tt>* To use multi-levels (up to three), use a plus symbol: {{cmd|index}}<tt>index{beans+baked}</tt>* To cross-reference items, use {{cmd>|seeindex}}: {{cmd|seeindex}}<tt>[CONTEXT]{\ConTeXt}{\TeX}</tt>.* To include the index without a title, use: {{cmd|placeindex}}* To include the index with a title, use: {{cmd|completeindex}}
If Note that the {{cmd|completeindex}} command might not work correctly. In such situations you need multiple levels (up to three), can use "+" or "&" separators like in <: {{cmd>index</cmd>|subject}}<tt>{beans+bakedIndex}</tt>.{{cmd|placeindex}}
'''Note: In MkIV (Sept.2010) "&" gives an error "Misplaced alignment tab character &" ''' '''So, just use "+" ''' You get a cross reference in your index with <cmd>seeindex</cmd> like in <cmd>seeindex</cmd><tt>[CONTEXT]{\ConTeXt}{\TeX}</tt> (ConTeXt: see TeX).==Example==
To typeset the index, use <cmd>placeindex</cmd> (without title) or <cmd>completeindex</cmd> (with titling).
 
==Example==
<texcode>
My \index{dog}dog is a \index{dog+bullterrier}bullterrier named \seeindex{Dolly}{Underware}Dolly.
=Styling the Index=
 
Registers consist of three text elements that can be styled
independently:
the sections headings, the entry text, and a page number (reference).
For formatting purposes each has its own key so it can be referred to
consistently:
 
* <tt>style</tt> refers to the style of ''headings''; ordinarily these are the letters of the alphabet.
* <tt>textstyle</tt> refers to the typeset content of an entry;
* <tt>pagestyle</tt> refers to the typeset page number of an entry;
* page numbers are references so their appearance depends on the [[Interaction|interaction]] settings as well.
 
== MkIV ==
 
=== General Setup ===
The appearance of a register can be configured with {{cmd|setupregister}}.
An example setup for the register ''entity'' could look like:
 
<texcode>
\defineregister [entity]
\setupregister [entity] [
style=sansbold, %% headings
textstyle=slanted, %% entries
pagestyle=bolditalic, %% page refs
n=1, %% columns
]
</texcode>
 
This typesets sections in bold face sans serif, entries with slant, and
page references in italic.
Also, the register will use a single column.
 
In MkIV {{cmd|setupregister}} is consistent with the common interface
to [[Style_Alternatives|text style]].
Thus for every <tt>style</tt> there is a corresponding <tt>color</tt>
option (''color'', ''textcolor'', and ''pagecolor''):
 
<texcode>
\setupregister [entity] [
color=red,
textcolor=green,
pagecolor=blue,
]
</texcode>
 
Naturally, self-defined alternatives are valid as well:
 
<texcode>
\definefontfeature [textfigures] [onum=yes]
 
\definealternativestyle [reg:bigbold] [\bfc] []
\definealternativestyle [reg:tinybold] [\bfxx] []
\definealternativestyle [reg:bignum] [\tfc\addff{textfigures}] []
 
\defineregister [entity]
\setupregister [entity] [
style=reg:bigbold,
textstyle=reg:tinybold,
pagestyle=reg:bignum,
]
</texcode>
 
Use with care!
 
=== Processors ===
 
The [[Registers#Individiual_Entries|traditional approach]] to
fine-tuning entries has not (yet?) been implemented in MkIV
[http://www.ntg.nl/pipermail/ntg-context/2013/070961.html].
Instead, there is a new mechanism called ''processors'' available that
has a similar effect
[http://www.ntg.nl/pipermail/ntg-context/2010/049493.html].
 
Processors are created via {{cmd|defineprocessor}}:
 
<texcode>
\defineprocessor [relevant] [style=italic]
</texcode>
 
To apply it to a register entry, we employ the <tt>-&gt;</tt> operator:
<texcode>
Text \entity{foo}text.
Text \entity{relevant->bar}text.
Text \entity{baz}text.
</texcode>
 
This will render ''bar''’s entry in the register ''entity'' in italic
font, while the other two entries remain unchanged.
 
<context mode=mkiv source=no>
\defineregister [entity]
\setupregister [entity] [
style=sansbold,
textstyle=normal,
pagestyle=bolditalic,
n=1,
]
 
\defineprocessor [relevant] [style=italic]
 
\starttext
\placeentity \page
 
Text before.
Text \entity{foo}text.
Text \entity{relevant->bar}text.
Text \entity{baz}text.
Text after.
\stoptext
</context>
 
A processor is not local to a specific register (as it was in MkII).
Once defined it can be applied to different registers, yielding the
same effect:
 
<texcode>
\defineregister [first]
\defineregister [second]
\defineregister [third]
\defineprocessor [relevant] [style=italic,color=blue]
\starttext %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\placefirst \placesecond \placethird \page
Text before.
Text \first {foo} \first {relevant->bar 1} \first {baz}text.
Text \second{foo} \second{relevant->bar 2} \second{baz}text.
Text \third {foo} \third {relevant->bar 3} \third {baz}text.
Text after.
\stoptext %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
</texcode>
 
The same processor can be applied to to both entries and page numbers.
(Another difference from MkII.)
For page numbers, apply the <tt>-&gt;</tt> operator on the optional
first argument:
 
<texcode>
\entity[relevant->]{foo}
</texcode>
 
Note that <code>\entity[weird]{foo}</code> is not enough.
Without the <tt>-&gt;</tt>, the first argument is interpreted as sort
key.
However, if in addition to the page number processor you wish to supply
a custom sort key, then the sort key must follow the processor:
 
<texcode>
\entity[relevant->baz]{foo}
</texcode>
 
In this example, the page number will be displayed using the processor
''relevant'' and the entity ''foo'' will be treated like the string
''baz'' for sorting purposes.
Of course, page number and text formatting can be combined:
 
<texcode>
\entity[relevant->]{relevant->foo}
</texcode>
 
Processors work well with multi-level indices:
 
<texcode>
\entity {relevant->foo}
\entity {relevant->foo+bar}
\entity {relevant->foo+bar+baz}
</texcode>
 
''Applying multiple processors to a single entry has no effect.''
Context will ignore any other processor after the first.
(This is probably a feature, as there is no need to repeat the
processor with every entry.)
However, different entries in the page reference list can be formatted
differently:
 
<context mode=mkiv source=yes>
\setupcolor[rgb]
\defineregister [stuff] [style=sansbold,pagestyle=italic,n=1]
\defineprocessor [relevant] [style=bold,color=red]
\defineprocessor [irrelevant] [color=darkgray]
 
\starttext
\placestuff
 
\page Text \stuff {relevant->foo} text.
\page Text \stuff {foo} text.
\page Text \stuff [relevant->] {foo} text.
\page Text \stuff {irrelevant->foo} text. %% no effect!
\page Text \stuff [irrelevant->] {foo} text.
\stoptext
</context>
 
=== Examples ===
==== Simple Setup ====
 
<context mode=mkiv source=yes>
\defineregister [entity]
\setupregister [entity] [
style=sansbold,
textstyle=slanted,
pagestyle=bolditalic,
n=1,
]
 
\starttext
 
\placeentity \page
 
Text before.
Text \entity{foo} \entity{bar} text.\page
Text \entity{foo} \entity{baz} text.\page
Text \entity{foo} \entity{bar} text.\page
Text \entity{foo} \entity{xyzzy} text.\page
Text after.
\stoptext
</context>
 
==== Colorful Setup ====
 
<context mode=mkiv source=yes>
\defineregister [entity]
\setupregister [entity] [
color=red,
textcolor=green,
pagecolor=blue,
n=1,
]
 
\starttext
 
\placeentity \page
 
Text before.
Text \entity{foo} \entity{bar} text.\page
Text \entity{foo} \entity{baz} text.\page
Text \entity{foo} \entity{bar} text.\page
Text \entity{foo} \entity{xyzzy} text.\page
Text after.
\stoptext
</context>
 
==== Setup with Alternatives ====
 
<context mode=mkiv source=yes>
\setuppapersize[A10][A7,landscape]
 
\setuppaper[nx=4, ny=2]
\setuplayout[location=middle,marking=on]
\setuparranging [XY]
 
\definefontfeature [textfigures] [onum=yes]
 
\definealternativestyle [reg:bigbold] [\bfc] []
\definealternativestyle [reg:tinybold] [\bfxx] []
\definealternativestyle [reg:bignum] [\tfc\addff{textfigures}] []
 
\defineregister [entity]
\setupregister [entity] [
style=reg:bigbold,
textstyle=reg:tinybold,
pagestyle=reg:bignum,
]
 
\starttext
 
\placeentity \page
 
Text before.
Text \entity{foo} \entity{bar} text.\page
Text \entity{foo} \entity{baz} text.\page
Text \entity{foo} \entity{bar} text.\page
Text \entity{foo} \entity{xyzzy} text.\page
Text after.
\stoptext
</context>
 
==== Complex Setup ====
 
<texcode>
\definefontfeature [textfigures] [onum=yes]
 
\definealternativestyle [reg:heada] [\WORD\ssa\bold]
\definealternativestyle [reg:headb] [\word\tfb\sc]
\definealternativestyle [reg:pageno] [\addff{textfigures}\italic]
 
\defineregister [entity] [style=reg:heada,pagestyle=normal,n=3]
\defineregister [object] [style=reg:headb,pagestyle=reg:pageno,n=2]
 
\defineprocessor [relevant] [style=italic]
\defineprocessor [weird] [style=italic,color=red]
\defineprocessor [striking] [style=bold,color=blue]
 
\starttext
 
\placeentity \blank[3*big] \placeobject \page
 
\dorecurse{3}{
Text before.
\page Text \entity {foo} text.
Text \object {striking->bar} text.
Text \entity {baz+foo} text.
Text \object {foo+bar} text.
\page Text \entity[relevant->] {weird->foo} text.
\page Text \entity {weird->bar} text.
Text \object[weird->] {foo} text.
Text \object {baz} text.
\page Text \entity[weird->foo] {foo} text.
\page Text \entity[weird->] {baz} text.
Text \object {baz} text.
Text \object {bar+baz} text.
Text \entity[weird->] {baz} text.
Text \entity {baz+miranda} text.
Text \entity {baz+xyzzy} text.
Text \object {foo} text.
\page Text \entity {weird->foo} text.
Text \object[striking->] {bar+baz} text.
Text \object {foo} text.
Text \entity[relevant->] {baz+xyzzy} text.
\page Text \entity[weird->foo] {foo} text.
Text \object {bar+xyzzy} text.
Text \object {baz} text.
Text \object {foo} text.
Text \entity[weird->] {baz+xyzzy+meh} text.
\page Text \entity[weird->] {weird->foo} text.
Text \object[striking->] {foo} text.
Text \object {xyzzy} text.
Text \entity {baz+xyzzy} text.
Text after.
}
 
\stoptext
</texcode>
 
== MkII ==
finally, ''pagestyle'' sets the page number references (slanted).
=== Individiual Individual Entries ===
Better granularity regarding the formatting of individual entries can
be achieved through the ''three-argument'' version of
\stoptext
</texcode>
category>+
/context>
 
==== Colorful Setup ====
=More Registers=
<{{cmd>|index</cmd> }} is only one special case of <cmd>{{gen|register</cmd>}}. You can define as much different registers as you like:
<{{cmd>|defineregister</cmd>}}<tt>[singular name][plural name]</tt>, e.g.
<texcode>
\defineregister[mouse][mice]
=Tricks=
* <A register per chapter: {{cmd>startregister</cmd><tt>[index][mymouse]{mouse|placeregister}}</tt> ... <cmd>stopregister</cmd><tt>[index][mymousecriterium=chapter]</tt>: to mark several pages for the same entry; becomes e.g. "mouse 12-* Uppercase-16". Note that if you have two or more of these ranges, you need them to have different <tt>[key]</tt> values to stop the system treating them as part of a great big range. So, use <cmd>startregister</cmd><tt>[letter index][mymouse1]heads: {{mouse}</tt> ... <cmd>stopregister</cmd><tt>[index][mymouse1]</tt> and then <cmd>startregister</cmd><tt>[index][mymouse2]{mouse|setupregister}</tt> ... <cmd>stopregister</cmd><tt>[index][mymouse2]</tt> to get two independent ranges in the list. <cmd>startregister</cmd> takes four arguments, of which two are mandatory: <cmd>startregister</cmd><tt>[NAME_OF_REGISTER]{ENTRY_NAME}</tt>. The other arguments are <tt>[KEY_FOR_RANGE]</tt> and <tt>[KEY_FOR_SORTING]</tt>. To give an example: <cmd>startregister</cmd><tt>[index][levi][Levi-Strauss]{Lévi|-|Strauss}</tt>. This will start a range with the key <tt>levi</tt> which will put the entry "Lévi-Strauss" in the register "index" (the "normal" register) and sort it under "Levi-Strauss." To mark the end of the rangen=2, you write <cmd>stopregister</cmd><tt>[index][levi]</tt>.* Automatically collapse page ranges: <cmd>placeindex[compresscommand=yes]</cmd>* <cmd>writetoregister</cmd> (sometimes needed to avoid macro expansion issues)* A register per chapter: <cmd>placeregister</cmd><tt>[index][criterium\Word,style=chapternormal]</tt>
* Place a word in text ''and'' index: <tt>\def\Tindex#1{\index{#1}#1}</tt> -- Please someone enhance this to get space correction, [] sorting etc.!
* {{cmd|writetoregister}} (sometimes needed to avoid macro expansion issues, '''MkII only''')  == Collapse Page Numbers == Often index entries like "mouse 2,3,4,5" aren’t desired, instead ConTeXt should shorten it to "mouse 2–5". This is called collapsing.There are two ways to collapse page numbers: # {{cmd|setupregister}}[compress=yes] # Enclose several pages in {{cmd|startregister}} … {{cmd|stopregister}}: <texcode>\startregister[index][Keycode1]{Keyword} % lots of text\stopregister[index][Keycode1]</texcode> The first parameter of {{cmd|startregister}} is the name that of the index – "index" is the default index, but you might use your self defined registers as well. The second parameter is a keyword to distinguish several overlapping range-entries. It’s also possible to use the sorting parameter: <texcode>\startregister[index][levi][Levi-Strauss]{Lévi|-|Strauss} % lots of text\stopregister[index][levi]</texcode> This will get create a range with the key <tt>levi</tt> which will put the entry "Lévi-Strauss" in the head of \register "index" (the "normal" register) and sort it under "Levi-Strauss." == Rename Register Heading == Change the {{cmd|completeregister can be set with}} heading using the {{cmd|setupheadtext}} command. For example:  <context source="yes">\defineregister[photographer][] \setupregister[photographer][ indicator=no,] \setupheadtext[photographer=Credits] \starttext \photographer{Yousuf Karsh}  \completephotographer\stoptext </context> == Alphabetical Headers ==  The letters of the alphabet can be disabled by {{cmd|setupregister}}<tt>[register][indicator=no]</tt>. The vertical spaces between the entry groups for subsequent letters is governed by the parameter <tt>before</tt> in the same command (default: <tt>\blank</tt>, change to <tt>before=My new {}</tt> to get no additional space). =Sorting= The sorting of the indexis influenced by the current [[Languages#Language_tags|language tag]]. You can override that with the {{key|language}} key of {{cmd|setupregister}}.There are a few additional "languages" for sorting, as defined in {{src|sort-lan.mkiv}}:* <tt>DIN 5007-1</tt> (German) normal sorting, ß = ss* Get uppercase<tt>DIN 5007-2</tt> (German) phonebook sorting, ä = ae, ö = oe, ü = ue, ß = ss* <tt>Duden</tt> (German) ß = s* <tt>de-letter heads: AT</tt> (Austrian German) phonebook sorting; umlauts after base vocal (a, ä, o, ö, u, ü) * <tt>cu</tt> (Church Slavonic)* <cmdtt>setupregisterocs-scn</cmdtt> (Scientific Old Slavonic transcription)* <tt>ru-iso9</tt>(Russian transcription) Additionally, there’s the {{key|method}} key that influences the order of upper-/lowercase and diacritics: The details lay in a rather obscure set of methods (see {{src|sort-ini.lua|source}}), for which the following presets are defined: * {{key|default}} = {{key|"zc,pc,zm,pm,uc"}} (uppercase like lowercase, diacritics separate)* {{key|before}} = {{key|"mm,mc,uc"}} (upper before lower, diacritics ignored)* {{key|after}} = {{key|"pm,mc,uc}} (lower before upper, diacritics ignored)* {{key|first}} = {{key|"pc,mm,uc"}} (lower before upper, diacritics separate)* {{key|last}} = {{key|"mc,mm,uc"}} (upper before lower, diacritics separate)* If you don’t set the sorting method, the preset "first" ist used (and not "default").* There’s no preset for the combination "uppercase like lowercase, diacritics ignored", try {{key|"zm,pm,zc,zm,uc"}}.* The sorting is also influenced by the current language or the language setting in {{cmd|setupregister}}. e.g.<texcode>\setupregister[index][ n=21,command language=\WordDuden,style method=normal{zm,pm,zc,zm,uc},]</tttexcode>
=Coupled Registers=
This is a special feature for documents that are only used on screen: Make a word clickable to jump to the index, the first or last occurrence.
Enable it with <{{cmd>|setupregister</cmd>}}<tt>[index][coupling=yes]</tt>.Substitute <{{cmd>|index</cmd> }} with <{{cmd>|coupledindex</cmd> }} and enjoy!
=Impact on vertical spacing=
In some situations, placing an <{{cmd>|index</cmd> }} (or related command) might affect vertical spacing and the page-breaking mechanism. In those situations it is advisable to wrap the command in a <{{cmd>|doflushatpar</cmd> }} as shown below (needs a ConTeXt version dated after 14th Dec 2005):
<texcode>
</texcode>
Note the two possible definitions, and the pitfalls with each one. If you are still having trouble with specific <{{cmd>|index</cmd> }} commands, try using the alternative definition. When they are used in the right context, these three possible ways of placing an index term (the plain <{{cmd>|index</cmd>}}, or it wrapped in one of the two possible <{{cmd>|doflushatpar</cmd>}}s, should solve any problem. =Impact on hyphenation, and on line breaking as a consequence= {{cmd|index}} is attached to a word, so it modifies the word boundaries. That influences its hyphenation and likely the paragraph's line breaking. To prevent that, you can write: <texcode>This is an indexed term\wordboundary\index{Term}. % instead of simply ... term\index{Term}.</texcode> That way, ConTeXt knows that the word "term" is ended by the "m" and not by something attached to it by {{cmd|index}}, and the effect on hyphenation and line breaking is the same as if we wrote: <texcode>This is an indexed term.</texcode> [[Category:Basics]]

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