Adding Rows to Selected Rows

The <data status> element includes the pasteBelowOrAbove="true" attribute/ value, and the <item> element includes the data about the object to be pasted including the pasteAboveToRow or pasteBelowToRow attribute with the row data.

For example:

<mxRoot>

<action>

<![CDATA[refresh]]>

</action>

<data status="committed"  pasteBelowOrAbove="true">

<item oid="30536.59499.40784.21329" 
relId="30536.59499.40784.14515" pid="30536.59499.60784.65279" 
pasteAboveToRow="0,0" />

</data>

</mxRoot>

The pasted row can be set as editable or non-editable by adding the RowEditable (values 
of true or false) attribute to the <item> element as shown here:
<mxRoot>
<action>
<![CDATA[refresh]]>
</action>
<data status=" committed "  pasteBelowOrAbove="true">
<item RowEditable="false" oid="30536.59499.40784.21329" 
relId="30536.59499.40784.14515" pid="30536.59499.60784.65279" 
pasteBelowToRow="0,0" />
</data>
</mxRoot>
</mxRoot>
You can paste a row as the child of the selected row in committed or pending mode 
(defined by the data status element):
<mxRoot>
<action>add</action>
    <data status='pending' fromRMB='false'>
       <item oid='43472.32595.47845.16772'
       relType='relationship_SBOrdersToLineItems' relId=''
       pid='40712.19048.41410.33' direction='from'>
       <column name='Description'>Description 00</column>
       </item>
    </data>
</mxRoot>