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-<?xml version="1.0" encoding="UTF-8"?>
-<document>
- <properties>
- <title>Tuscany DAS</title>
- <bannertitle>Tuscany DAS</bannertitle>
- <author email="luckbr1975@gmail.com">Luciano Resende</author>
- <tab>das</tab>
- </properties>
- <body>
-
- <section name="Data Access Service - Overview">
- <p>RDB DAS provides robust a generic data access service that provides
- transformation capability between SDO data graphs and relational databases and
- vise versa. </p>
-
- <p>By using RDB DAS, applications developers avoid the details and complications
- of working directly with a relational database and also the complex transformation
- between relational rows/columns and Data Object types/properties.
- </p>
-
- <p>RDB DAS works with SDO to improve your data access performance.The RDB DAS
- processes the SDO change summary and produces efficient update statements
- that only write to columns that have actually been modified.
- </p>
-
-
- <p>The following diagram illustrates these two capabilities in
- a typical client interaction.The client
- starts by reading a graph of data specified by some query.The client then makes modifications to the
- graph, possibly by adding elements, and then requests the DAS to push the
- changes back to the database.</p>
-
- <img src ="images/sdo_das_sm.jpg" alt="DAS Capabilities" align="middle" border="0" height="407" width="600"/>
-
- <p>To further explore the benefits of DAS please refer to white
- paper &quot;DAS White Paper: The Data Access Service&quot; on the <a
- href="documentation.html">Documentation
- page</a>.</p>
- </section>
-
- <section name="General DAS Documentation">
- <p>Below, there is a list of various links to documents that help to explain various aspects of the
- Tuscany DAS subproject and the programming model that it provides. More general documentation
- which applies to the Tuscany project as a whole can be found on the
- <a href="documentation.html">Tuscany Documentation page</a>.
- </p>
-
- <p>
- <table class="bodyTable">
- <tr class="b">
- <td>
- <span style="font-weight: bold;">Title</span>
- </td>
- <td>
- <span style="font-weight: bold;">Description</span>
- </td>
- </tr>
-
- <tr class="b">
- <td>
- <a href='RDB_DAS_white_paper_v-0.2.pdf' target='_blank'>DAS White Paper: The Data Access Service</a>
- </td>
- <td>
- How to access relational data in terms of Service Data Objects
- </td>
- </tr>
-
- <tr class="b">
- <td>
- <a class="external" rel="nofollow" href='http://java.sys-con.com/read/260053.htm'>JDJ DAS Article</a>
- </td>
- <td>
- How to access relational data in terms of Service Data Objects
- </td>
- </tr>
- </table>
- </p>
- </section>
-
- </body>
-</document>