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>SDO_DAS_Relational::createRootDataObject</H1
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>    (no version information, might be only in CVS)</P
>SDO_DAS_Relational::createRootDataObject&nbsp;--&nbsp;
   Returns the special root object in an otherwise 
   empty data graph. Used when creating a data graph from scratch.
  </DIV
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NAME="AEN205198"
></A
><H2
>说明</H2
>SDODataObject <B
CLASS="methodname"
>SDO_DAS_Relational::createRootDataObject</B
> ( void  )<BR
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>本函数是<SPAN
CLASS="emphasis"
><I
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>实验性</I
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>的。本函数的行为，包括函数名称以及其它任何关于本函数的文档可能会在没有通知的情况下随
PHP 以后的发布而改变。使用本函数风险自担。</P
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>&#13;   Returns the special root object at the top of an otherwise 
   empty data graph.
   This call is used when the application wants to create a 
   data graph from scratch, without having called
   <B
CLASS="function"
>executeQuery()</B
>
   to create a data graph.
  </P
><P
>&#13;   The special root object has one multi-valued containment property, 
   with a name of the application root type that was passed when 
   the Relational DAS was constructed.
   The property can take values of only that type.
   The only thing that the application can usefully do with the root 
   type is to call
   <B
CLASS="function"
>createDataObject()</B
>
   on it, passing the name of the application root type,
   in order to create a data object of their own application type.
  </P
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><H2
>参数</H2
><P
>&#13;   None.
  </P
></DIV
><DIV
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><A
NAME="AEN205214"
></A
><H2
>返回值</H2
><P
>&#13;   The root object.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN205217"
></A
><H2
>错误／异常</H2
><P
>&#13;   None.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN205220"
></A
><H2
>范例</H2
><P
>&#13;   Please see the
   <A
HREF="ref.sdo.das.rel.html#sdo.das.rel.examples"
>Examples</A
>
   section in the general information about the Relational DAS
   for many examples of calling this method.
  </P
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