2006-07-11 Senganal T <tsenganal@novell.com>

2006-07-11  Senganal T <tsenganal@novell.com>

	* Test/System.Data/schemas/test017.xsd : test if Relations and columns are
	created correctly if schema is nested but relation is not.

	* Test/System.Data/DataSetTest2.cs : Added tests for DataSet.WriteXmlSchema and
	ReadXmlSchema methods to test nested schemas.
	Also tests for bug #78810.

	* System.Data/XmlSchemaWriter.cs :
		- WriteTableType : If Relation.Nested is true, then nest the
		table schemas. Correct the xml to add the table element within
		the <Sequence> element.
		- WriteChildRelations : Correct the Xml element name and
		attributes. Close the attribute correctly.
	* System.Data/XmlSchemaDataImporter.cs :
		- GenerateRelationship : When creating the relations, if
		ParentColumn exists but Corr ChildCol is null, create a child
		Column with the same name and type as the parent column.
		- Renamed DataSetDefinesPrimaryKey to DataSetDefinesKey
		- DataSetDefinesKey : if either xsd:key or xsd:keyref is
		defined for the dataset, do not manually create the relations.
		fixes bug #78810
		- AddParentKeyColumn : if Columnname already exists, use
		colname_0 instead of throwing an exception.
		- FillDataColumnRepeatedSimpleElement : Do not set the Unique
		value as it creates a constraint by default. The unique value
		is automatically set when pk is set.
		- CreateChildColumns : Added. Creates a ChildColumn duplicating
		ParentColumn properties.

svn path=/trunk/mcs/; revision=62443