Databases
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Postsdbo
PO
 

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    <p>How do you need to access your data?</p> <p>If it is one-pass, then you don't need to build the tree in memory. You can use <a href="http://www.saxproject.org/" rel="nofollow noreferrer">SAX</a> (fast, simple) or <a href="http://stax.codehaus.org/Home" rel="nofollow noreferrer">StAX</a> (faster, not quite so simple).</p> <p>If you need to keep the tree in memory to navigate, <a href="http://www.xom.nu/" rel="nofollow noreferrer">XOM</a> or <a href="http://www.jdom.org/" rel="nofollow noreferrer">JDOM</a> are good choices. <a href="http://www.w3.org/DOM/" rel="nofollow noreferrer">DOM</a> is the <em>Choice Of Last Resort</em>, whether it is level 1, 2, or 3, with or without extensions.</p> <p>Xerces, which is the parser included with Java (although you should get the updated version from Apache and not use the one bundled with Java, even in 6.0), also has a streaming native interface called <a href="http://xerces.apache.org/xerces2-j/xni.html" rel="nofollow noreferrer">XNI</a>.</p> <p>If you want to hook other pre-made parts up in the chain, often SAX or StAX work well, since they might build their own model in memory. For example, the <a href="http://www.saxonica.com/" rel="nofollow noreferrer">Saxon</a> XSLT/XQuery engine works with DOM, SAX or StAX, but builds internally a <a href="http://www.saxonica.com/documentation/javadoc/net/sf/saxon/tinytree/package-summary.html" rel="nofollow noreferrer">TinyTree</a> (default) or DOM (optional). <a href="http://www.xquery.com/" rel="nofollow noreferrer">DataDirect XQuery</a> works with SAX, StAX or DOM also, but <em>really</em> likes StAX.</p>
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    1. COOdd that you say SAX is simpler than StAX. SAX may be a simpler API, but writing StAX-based code is an awful lot easier than writing against SAX.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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