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<head>
<title>XML-ISO</title>
<meta charset="UTF-8"/>
<link rel="stylesheet" type="text/css" href="../book.css"/>
</head>
<body>
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Content below this point is copied in "/asf-staging/book/en/developer-guide.html" file
by the `org.apache.sis.internal.book.Assembler` class in `sis-build-helper` module.
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<section>
<header>
<h2 id="XML-ISO">Representing objects in <abbr>XML</abbr></h2>
</header>
<p>
Different <abbr>OGC</abbr>/<abbr>ISO</abbr> standards do not always use the same strategy to express objects in <abbr>XML</abbr>.
<abbr>ISO</abbr> 19115-3 standard in particular uses a more verbose approach than other standards,
and will be the subject of its <a href="#XML-ISO-19115">own section</a>.
But most <abbr>XML</abbr> formats define supplementary types and attributes that are not part of the original abstract specifications.
These supplementary attributes are usually specific to <abbr>XML</abbr> and may not appear in the <abbr>API</abbr> of Apache <abbr>SIS</abbr>.
However, some of these attributes, such as <code class="OGC">id</code>, <code class="OGC">uuid</code> and
<code>xlink:href</code>, remain accessible in the form of key-value pairs.
</p>
<p>
<abbr>XML</abbr> documents may use any prefixes,
but the following prefixes are commonly used.
They therefore appear by default in documents produced by Apache <abbr>SIS</abbr>.
These prefixes are defined in the <code>org.apache.sis.xml.Namespaces</code> class.
</p>
<table>
<caption>Common <abbr>XML</abbr> namespace prefixes</caption>
<tr>
<th>Prefix</th>
<th>Namespace</th>
</tr>
<tr>
<td><code>gco</code></td>
<td><code>http://www.isotc211.org/2005/gco</code></td>
</tr>
<tr>
<td><code>gfc</code></td>
<td><code>http://www.isotc211.org/2005/gfc</code></td>
</tr>
<tr>
<td><code>gmd</code></td>
<td><code>http://www.isotc211.org/2005/gmd</code></td>
</tr>
<tr>
<td><code>gmi</code></td>
<td><code>http://www.isotc211.org/2005/gmi</code></td>
</tr>
<tr>
<td><code>gmx</code></td>
<td><code>http://www.isotc211.org/2005/gmx</code></td>
</tr>
<tr>
<td><code>gml</code></td>
<td><code>http://www.opengis.net/gml/3.2</code></td>
</tr>
<tr>
<td><code>xlink</code></td>
<td><code>http://www.w3.org/1999/xlink</code></td>
</tr>
</table>
<xi:include href="XML-ISO-19115.html"/>
</section>
</body>
</html>