intro.sdo-das-xml.html

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head>  <title>Introduction</title>  <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="book.sdo-das-xml.html">SDO DAS XML</a></div> <div class="next" style="text-align: right; float: right;"><a href="sdo-das-xml.setup.html">Installing/Configuring</a></div> <div class="up"><a href="book.sdo-das-xml.html">SDO DAS XML</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="intro.sdo-das-xml" class="preface">  <h1 class="title">Introduction</h1>  <p class="para">   In order to use the XML Data Access Service for Service Data Objects,   you will need to understand some of the concepts behind SDO:   the data graph, the data object, XPath and property expressions,   and so on.   If you are not familiar with these ideas, you might want to look first at   <a href="ref.sdo.html" class="link">the section on SDO</a>.  </p>  <p class="para">   The job of the XML DAS is to move data between the   application and an XML data source, which can be either a file or   a URL. SDOs are always created and maintained according to a model    which defines type names and what property names each type may have.   For data which is from XML, this SDO model is built from a schema file    written in XML schema language (an xsd file). This schema file is    usually passed to the create method when the XMLDAS is initialised.    The    <a href="http://www.ibm.com/developerworks/webservices/library/specification/ws-sdo/" class="link external">&raquo; SDO 2.0 specification</a>   defines the mapping between XML types and SDO types.   There are a number of small limitations in the PHP support -   not everything which is in the specification can be done - and   these limitations are summarised in a later section.  </p> </div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="book.sdo-das-xml.html">SDO DAS XML</a></div> <div class="next" style="text-align: right; float: right;"><a href="sdo-das-xml.setup.html">Installing/Configuring</a></div> <div class="up"><a href="book.sdo-das-xml.html">SDO DAS XML</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>

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