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WebMake: Documentation: The <metaset> and <usemetaset> Tags
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<h1>The <metaset> and <usemetaset> Tags</h1><p>
By default, WebMake includes some named <a href="metadata.html">metadata</a> you can use, such as
<strong>Title</strong>, <strong>Author</strong>, and <strong>Score</strong>. Each of these can have a type (numeric
or string), and a default value.
</p>
<p>
You can also use your own, arbitrary names for <a href="metadata.html">metadata</a>, but they won't
get a type or a default value.
</p>
<p>
The <metaset> tag allows you to define a set of <a href="metadata.html">metadata</a>, assign an id
to that set, and set default values and types for them.
</p>
<p>
You then surround the parts of your WebMake file which uses these sets
in a <usemetaset> block.
</p>
<a name="Metaset_Tag" id="Metaset_Tag"><h3>Metaset Tag</h3></a><p>
The metaset tag is used as a block, with an <code>id</code> attribute. Inside
the block, define the <a href="metadata.html">metadata</a>, one per line, in this format:
</p>
<blockquote>
<code>Name</code>: type=<code>type</code> default="<code>defaultvalue</code>"
</blockquote>
<p>
Type can be either <code>string</code> or <code>numeric</code>. The name can contain
only alphanumeric characters, <code>_</code> and <code>.</code>.
</p>
<p>
For example:
</p>
<p>
<!--etsafe-->
<pre>
<metaset id="dc">
DC.Title: type=string default="(Untitled)"
</metaset>
</pre><!--/etsafe-->
</p>
<a name="Usemetaset_Tag" id="Usemetaset_Tag"><h3>Usemetaset Tag</h3></a><p>
This is a scoped tag. Any other WebMake tags inside the
*<usemetaset> ... </usemetaset>** block will used that
metaset for their <a href="metadata.html">metadata</a>.
</p>
<p>
It requires an <code>id</code> tag which refers to the <metaset>
block in question.
</p>
<a name="Example" id="Example"><h2>Example</h2></a><p>
<!--etsafe-->
<pre>
<metaset id="dc">
DC.Title: type=string default="(Untitled)"
</metaset>
<usemetaset id="dc">
<metadefault name="DC.Title" value="Chunk">
<content name="chunk_1.txt">...</content>
</metadefault>
<{perl
# ... perl code which uses the metadata ...
}>
<out name="foo" file="foo.html">
${chunk_1.txt}
</out>
</usemetaset>
</pre><!--/etsafe-->
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