B.3 diffgr Namespace

The diffgr namespace contains XML attributes used to mark up a DiffGram document with versioning information. Here's how the diffgr namespace is imported in a DiffGram document:

 <xs:schema id="DataSetName" xmlns=""      xmlns:msdata="urn:schemas-microsoft-com:xml-msdata"     xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1"     xmlns:xsd="http://www.w3.org/2001/XMLSchema" >

The diffgr namespace includes several attributes that can be applied to row elements, as described in Table B-9. The values hasChanges can take on are listed in Table B-10.

Table B-9. diffgr row attributes

Attribute	Description
id	Uniquely identifies a row. This pairs the elements in the `<diffgr:before>` and `<diffgr:errors>` sections to the current data. This value is generated using the table name and row identifier (for example, `diffgr:id="Customers1"` ).
parentId	Used with relationships. Identifies the element that's the parent for the current row, using the parent's `diffgr:id` attribute.
hasChanges	Flags a row, identifying that is has been modified. This attribute is used only in the `<DataInstance>` section and can take one of the three values described in Table B-10.
hasErrors	If set to `true` , the row is flagged as having an error (which is described in the `<diffgr:errors>` section).
Error	Contains the text of the `DataRow.RowError` property. This is used only in the `<diffgr:errors>` section.

Table B-10. Values for hasChanges

Attribute	Description
Inserted	Represents a newly added row.
modified	Represents a row in which at least some data has changed from the data in the `<diffgr:before>` section. This doesn't include the deleted row, which appears in the `<diffgr:before>` section but nowhere else.
descent	Identifies an element in which one or more children from a parent-child relationship have been modified.