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<title>org.apache.sis.xml (Apache SIS 1.0 API)</title>
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<h1 title="Package" class="title">Package&nbsp;org.apache.sis.xml</h1>
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<div class="block">Provides methods for marshalling and unmarshalling SIS objects in XML.
The XML format is compliant with ISO 19115-3 specification for metadata,
and compliant with GML for referencing objects.
<p>The main class in this package is <a href="XML.html" title="class in org.apache.sis.xml"><code>XML</code></a>, which provides
property keys that can be used for configuring (un)marshallers and convenience
static methods. For example the following code:</p>
<blockquote><pre>XML.<b>marshal</b>(Citations.OGC, System.out);</pre></blockquote>
will produce a string like below:
<blockquote><pre>&lt;?xml version="1.0" encoding="UTF-8" standalone="yes"?&gt;
&lt;cit:CI_Citation xmlns:gmd="http://www.isotc211.org/2005/gmd"
xmlns:gco="http://www.isotc211.org/2005/gco"&gt;
&lt;cit:title&gt;
&lt;gco:CharacterString&gt;Open Geospatial Consortium&lt;/gco:CharacterString&gt;
&lt;/cit:title&gt;
... much more XML below this point ...
&lt;/cit:CI_Citation&gt;</pre></blockquote>
<div class="section">Customizing the XML</div>
In order to parse and format ISO 19115-3 compliant documents, SIS needs its own
<a href="https://docs.oracle.com/javase/8/docs/api/javax/xml/bind/Marshaller.html?is-external=true" title="class or interface in javax.xml.bind" class="externalLink"><code>Marshaller</code></a> and <a href="https://docs.oracle.com/javase/8/docs/api/javax/xml/bind/Unmarshaller.html?is-external=true" title="class or interface in javax.xml.bind" class="externalLink"><code>Unmarshaller</code></a> instances
(which are actually wrappers around standard instances). Those instances are created
and cached by <a href="MarshallerPool.html" title="class in org.apache.sis.xml"><code>Marshaller­Pool</code></a>, which is used internally by
the above-cited <code>XML</code> class. However developers can instantiate their own
<code>Marshaller­Pool</code> in order to get more control on the marshalling and unmarshalling
processes, including the namespace URLs and the errors handling.
<p>The most common namespace URLs are defined in the <a href="Namespaces.html" title="class in org.apache.sis.xml"><code>Namespaces</code></a> class.
The parsing of some objects like <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net" class="externalLink"><code>URL</code></a> and <a href="https://docs.oracle.com/javase/8/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>UUID</code></a>,
together with the behavior in case of parsing error, can be specified by the
<a href="ValueConverter.html" title="class in org.apache.sis.xml"><code>Value­Converter</code></a> class.</p></div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>0.3</dd>
<p><font size="-1">Defined in the <code>sis-metadata</code> module</font></p>
</dl>
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<caption><span>Interface Summary</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Interface</th>
<th class="colLast" scope="col">Description</th>
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<th class="colFirst" scope="row"><a href="IdentifiedObject.html" title="interface in org.apache.sis.xml">IdentifiedObject</a></th>
<td class="colLast">
<div class="block">The interface for all SIS objects having identifiers.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="IdentifierMap.html" title="interface in org.apache.sis.xml">IdentifierMap</a></th>
<td class="colLast">
<div class="block">A map view of some or all identifiers in an <a href="IdentifiedObject.html" title="interface in org.apache.sis.xml">identified object</a>.</div>
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<th class="colFirst" scope="row"><a href="IdentifierSpace.html" title="interface in org.apache.sis.xml">IdentifierSpace</a>&lt;T&gt;</th>
<td class="colLast">
<div class="block">Some identifier namespaces that are handled in a special way.</div>
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<th class="colFirst" scope="row"><a href="NilObject.html" title="interface in org.apache.sis.xml">NilObject</a></th>
<td class="colLast">
<div class="block">A marker interface for nil XML elements providing an explanation about why the information is absent.</div>
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<th class="colFirst" scope="col">Class</th>
<th class="colLast" scope="col">Description</th>
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<th class="colFirst" scope="row"><a href="MarshalContext.html" title="class in org.apache.sis.xml">MarshalContext</a></th>
<td class="colLast">
<div class="block">Context of a marshalling or unmarshalling process.</div>
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<th class="colFirst" scope="row"><a href="MarshallerPool.html" title="class in org.apache.sis.xml">MarshallerPool</a></th>
<td class="colLast">
<div class="block">Creates and configures <a href="https://docs.oracle.com/javase/8/docs/api/javax/xml/bind/Marshaller.html?is-external=true" title="class or interface in javax.xml.bind" class="externalLink"><code>Marshaller</code></a> or <a href="https://docs.oracle.com/javase/8/docs/api/javax/xml/bind/Unmarshaller.html?is-external=true" title="class or interface in javax.xml.bind" class="externalLink"><code>Unmarshaller</code></a> objects for use with SIS.</div>
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<tr class="altColor">
<th class="colFirst" scope="row"><a href="Namespaces.html" title="class in org.apache.sis.xml">Namespaces</a></th>
<td class="colLast">
<div class="block">Lists some namespaces URLs used by JAXB when (un)marshalling.</div>
</td>
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<tr class="rowColor">
<th class="colFirst" scope="row"><a href="NilReason.html" title="class in org.apache.sis.xml">NilReason</a></th>
<td class="colLast">
<div class="block">Explanation for a missing XML element.</div>
</td>
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<tr class="altColor">
<th class="colFirst" scope="row"><a href="ReferenceResolver.html" title="class in org.apache.sis.xml">ReferenceResolver</a></th>
<td class="colLast">
<div class="block">Controls the (un)marshaller behavior regarding the <code>xlink</code> or <code>uuidref</code> attributes.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="ValueConverter.html" title="class in org.apache.sis.xml">ValueConverter</a></th>
<td class="colLast">
<div class="block">Performs conversions of XML element or attribute values encountered during XML (un)marshalling.</div>
</td>
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<tr class="altColor">
<th class="colFirst" scope="row"><a href="XLink.html" title="class in org.apache.sis.xml">XLink</a></th>
<td class="colLast">
<div class="block">The XML attributes defined by OGC in the
<a href="http://schemas.opengis.net/xlink/1.0.0/xlinks.xsd">xlink</a> schema.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="XML.html" title="class in org.apache.sis.xml">XML</a></th>
<td class="colLast">
<div class="block">Provides convenience methods for marshalling and unmarshalling SIS objects.</div>
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<caption><span>Enum Summary</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Enum</th>
<th class="colLast" scope="col">Description</th>
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<th class="colFirst" scope="row"><a href="XLink.Actuate.html" title="enum in org.apache.sis.xml">XLink.Actuate</a></th>
<td class="colLast">
<div class="block">Communicates the desired timing of traversal from the starting resource to the ending
resource.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="XLink.Show.html" title="enum in org.apache.sis.xml">XLink.Show</a></th>
<td class="colLast">
<div class="block">Communicates the desired presentation of the ending resource on traversal
from the starting resource.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="XLink.Type.html" title="enum in org.apache.sis.xml">XLink.Type</a></th>
<td class="colLast">
<div class="block">The type of a <code>xlink</code>.</div>
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