<ManSection>
<Func Name="f" Arg="x[,y]" Comm="calculates something"/>
<Returns>an element in <Ref Filt="IsBlubb" /> or <K>fail</K>.</Returns>
<Description>
This function calculates something.
</Description>
</ManSection>
<ManSection>
<Meth Name="\^\{\}\[\]\<\&" Arg="c" Label="for nothing" Comm="tricky name"/>
<Description>
This method is for an operation with a tricky name.
</Description>
</ManSection>
<ManSection>
<Oper Name="MyOperation" Arg="x" Comm="calculates something"/>
<Description>
The operation <Ref Oper="MyOperation"/> operates on <Arg>x</Arg>.
</Description>
</ManSection>
<ManSection>
<Meth Name="MyOperation"Label="First" Arg="x"
Comm="generic method"/>
<Description>
This method calculates something by the generic method.
</Description>
</ManSection>
<ManSection>
<Meth Name="MyOperation"Label="for bla" Arg="x[, good_hint]"
Comm="for bla arguments"/>
<Description>
This is the super-fast method for the operation
<Ref Oper="MyOperation"/> if the argument <A>x</A> is in the
representation <Ref Filt="IsBla"/>. It will become even faster if
the optional argument <A>good_hint</A> is given.
</Description>
</ManSection>
<ManSection>
<Constr Name="MyConstructor" Arg="filt, x" Comm="constructs something"/>
<Description>
The constructor <Ref Oper="MyConstructor"/> constructs from <Arg>x</Arg>
an object in <A>filt</A>.
</Description>
</ManSection>
<ManSection>
<Filt Name="IsBla" Arg="obj" Comm="representation bla"
Type="representation"/>
<Description>
For objects in this representation there is a super-fast method
(see <Ref Meth="MyOperation"Label="for bla"/>) for the operation
<Ref Oper="MyOperation"/>.
</Description>
</ManSection>
<ManSection>
<Prop Name="IsBlubb" Arg="obj" Comm="property, whether object is blubb"/>
<Description>
A property.
</Description>
</ManSection>
<ManSection>
<Attr Name="NumberBlobbs" Arg="obj" Comm="number of blobbs"/>
<Description>
An attribute. Number of blobbs.
</Description>
</ManSection>
<ManSection>
<Var Name="AllBlibbs" Comm="list of all blibbs in the system"/>
<Description>
This global variable holds a list of all blibbs.
</Description>
</ManSection>
<ManSection>
<Fam Name="BlibbsFamily" Comm="family of blibbs"/>
<Description>
Family of all blibbs.
</Description>
</ManSection>
<ManSection>
<InfoClass Name="InfoBlibbs" Comm="InfoClass for the library of blibbs"/>
<Description>
This info class is used throughout the library of blibbs.
</Description>
</ManSection>
In this section we present examples for all the various types of text
that are possible in &GAPDoc;:
<List>
<Item>
<Emph>This</Emph> is <E>emphasized</E>.</Item>
<Item>
<E>Keywords</E> are typeset like <Keyword>this</Keyword> and <K>that</K>.
</Item>
<Item>
<E>Arguments</E> of functions have an element. They look like this:
<Arg>x</Arg> and <A>y</A>.</Item>
<Item>
<E>Code</E> can be written with the Code element:
<Code>if x = y then Print("Equal"); fi;</Code> or
<C>while true do Print("Hello"); od;</C>.</Item>
<Item>
<E>Filenames</E> have their own element:
<File>/usr/local/ca/gap4r2</File> or <F>pkg/xgap/doc</F>.</Item>
<Item>
<E>Buttons</E>, <E>menus</E>, <E>menu entries</E>, and such things
are also supported: <B>OK</B> or <Button>Cancel</Button>.</Item>
<Item>
<E>Packages</E> are typeset like this:
<Package>Small Groups Library</Package>
</Item>
<Item>
<E>Quoted</E> text: <Q>This is a text in quotes.</Q>
</Item>
</List>
<E>Paragraphs</E> are separated by the empty <C>Par</C> or <C>P</C> element.
<Par/><E>Alternatives</E> for different output formats:
<Alt Only="LaTeX">This is &LaTeX; output.</Alt>
<Alt Not="LaTeX">This is other than &LaTeX; output, namely:
<Alt Only="HTML"><![CDATA[<b>HTML</b>]]></Alt>
<Alt Only="Text">Text</Alt> output.</Alt>
<div class="example"><pre>
There are also three elements to typeset <Q>verbatim-like</Q> text.
<P/>
The first is a <E>Listing</E>:
<Listing Type="GAP code">
<![CDATA[Sieve := function(n)
# Returns the primes less than n
local l,p,i;
l := [1..n]; Unbind(l[1]);
p := 2;
while p^2 <= n do
if IsBound(l[p]) then
i := 2 * p;
while i <= n do Unbind(l[i]); i := i + p; od;
fi;
p := p + 1;
od;
return Compacted(l);
end;]]>
</Listing>
Here is a <E>Log</E> of a &GAP; session using this function:
For small formulae without <Q>difficult</Q> parts use the <C>M</C>
element: <M>b_i</M>,
<M>x^2</M>, <M>x^2 + 2x + 1 = (x + 1)^2</M>. Note that here whitespace
matters for text (or HTML) output).<P/>
Here are two formulae containing less than characters which are special
characters for XML:
<M><![CDATA[a < b < c < d]]></M> and <M>e < f</M>.
</Section>
</pre></div>
In this section we demonstrate various references to parts of this
document. Here is a reference to this section: <Ref Sect="Cross"/>.
Here is a reference to chapter <Ref Chap="First"/>, to appendix
<Ref Appendix="Appendix"/>, and to subsection <Ref Subsect="Asub"/>.
<P/>
We distinguish among others references
to functions (see <Ref Func="f"/>),
to methods with tricky name (see
<Ref Meth="\^\{\}\[\]\<\&"Label="for nothing"/>),
to operations (see <Ref Oper="MyOperation"/>),
to methods (see <Ref Meth="MyOperation"Label="First"/> or
<Ref Meth="MyOperation"Label="for bla"/>),
to filters (see <Ref Filt="IsBla"/>),
to properties (see <Ref Prop="IsBlubb"/>),
to attributes (see <Ref Attr="NumberBlobbs"/>),
to variables (<Ref Var="AllBlibbs"/>),
to families (see <Ref Fam="BlibbsFamily"/>),
and to info classes (see <Ref InfoClass="InfoBlibbs"/>).
<P/>
There are also references to labels: see <Ref Text="here"Label="there"/>,
to other books: see <Ref Sect="syntaxXML" BookName="gapdoc"/> or
<Ref Oper="IsSubgroup" BookName="ref"/> in the &GAP; reference
manual.
<P/>
References to sections come in two styles:
<Ref Chap="First"Style="Number"/>
or <Ref Chap="First"Style="Text"/>.
<P/>
Another type of cross referencing is bibliography. Here is a
citation: <Cite Key="CR1" Where="(5.22)"/> is an interesting lemma.
<P/>
One can generate index entries as follows (look up the words
<Q>&TeX;-UserGroup</Q>, <Q>RWTH</Q>, and <Q>Aachen, Hauptbahnhof</Q>).
<Index Key="TeX-Usergroup">&TeX;-UserGroup</Index>
<Index>RWTH</Index>
<Index>Aachen <Subkey>Hauptbahnhof</Subkey></Index>
<Index Key="GAPDoc" Subkey="for GAP programmers">&GAPDoc;
<Subkey>for &GAP; programmers</Subkey></Index>
<div class="example"><pre>
<Section><Heading>Lists and Tables</Heading>
There are
<List>
<Item>lists</Item>
<Item>enumerations, and</Item>
<Item>tables</Item>
</List>
or:
<Enum>
<Item>lists</Item>
<Item>enumerations, and</Item>
<Item>tables</Item>
</Enum>
or with marks:
<List>
<Mark>lists:</Mark><Item> not numbered</Item>
<Mark>enumerations:</Mark><Item> numbered</Item>
<Mark>tables:</Mark><Item> two-dimensional</Item>
</List>
Lists can also be nested:
<Enum>
<Item>
<Enum>
<Item>first item of inner enumeration </Item>
<Item>second item of inner enumeration </Item>
</Enum>
</Item>
<Item>
<List>
<Item>first item of inner list </Item>
<Item>second item of inner list </Item>
</List>
</Item>
</Enum>
<div class="example"><pre>
<Section><Heading>Entities and Special Characters</Heading>
<Label Name="TenBack"/>
[&see; <Ref Sect="Ten"/>]<P/>
Here is a table of special characters, the first two are special for
XML and must be typed in by entities in &GAPDoc; documents. The other
characters are special for &LaTeX; but in &GAPDoc; they can be typed
directly.
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nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
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