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pybliographer&nbsp;1.3.3
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<a href="Pyblio-module.html">Package&nbsp;Pyblio</a> ::
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Class&nbsp;Txo
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<h2 class="class">Type Txo</h2>
<pre class="base-tree">
<a href="__builtin__.object-class.html"><code>object</code></a> --+
|
<a href="../private/Pyblio.Attribute._Qualified-class.html"><code>_Qualified</code></a> --+
|
<b>Txo</b>
</pre><br />
<hr/>
<p>Element of a taxonomy.</p>
In the simplest case, this can be seen as a value in a enumerated set
of possible values. The possible values are defined as <a
href="Pyblio.Schema.TxoItem-class.html"
class="link"><code>Pyblio.Schema.TxoItem</code></a>s, and are stored in
the <a href="Pyblio.Store.Database-class.html"
class="link"><code>Store.Database</code></a>, in the <b>txo</b>
attribute, and <a href="Pyblio.Store.Record-class.html"
class="link"><code>Store.Record</code></a>s can contain Txo attributes
which refer to these <a href="Pyblio.Schema.TxoItem-class.html"
class="link"><code>Pyblio.Schema.TxoItem</code></a>s. Say you have a list
of known document types in the <i>document-type</i> taxonomy. You can
then affect the document type to the <i>type</i> attribute of a record
with the following operations:
<pre class="doctestblock">
<span class="py-src"><span class="py-prompt">&gt;&gt;&gt; </span>item = db.txo[<span class="py-string">'document-type'</span>].byname(<span class="py-string">'article'</span>)
<span class="py-prompt">&gt;&gt;&gt; </span>record.add(<span class="py-string">'type'</span>, item, Attribute.Txo)</span></pre>
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