XSD Annotations [SQLXML 4.0]
The following table lists the XSD annotations are available in SQL Server 2005, and compares them with the XDR annotations that were first introduced in SQL Server 2000.
| XSD annotation | Description | Topic link | XDR annotation |
|---|---|---|---|
sql:encode |
When an XML element or attribute is mapped to a SQL Server BLOB column, allows requesting a reference URI. This URI can be used later to return BLOB data. |
Requesting URL References to BLOB Data Using sql:encode [SQLXML 4.0] |
url-encode |
sql:field |
Maps an XML item to a database column. |
Same |
|
sql:guid |
Allows you to specify whether to use a GUID value generated by SQL Server or use the value provided in the updategram for that column. |
Not supported |
|
sql:hide |
Hides the element or attribute that is specified in the schema in the resulting XML document. |
Not supported |
|
sql:identity |
Can be specified on any node that maps to an IDENTITY-type database column. The value specified for this annotation defines how the corresponding IDENTITY-type column in the database is updated. |
Not supported |
|
sql:inverse |
Instructs the updategram logic to inverse its interpretation of the parent-child relationship that has been specified using <sql:relationship>. |
Specifying the sql:inverse Attribute on sql:relationship [SQLXML 4.0] |
Not supported |
sql:is-constant |
Creates an XML element that does not map to any table. The element appears in the query output. |
Creating Constant Elements Using sql:is-constant [SQLXML 4.0] |
Same |
sql:key-fields |
Allows specification of column(s) that uniquely identify the rows in a table. |
Same |
|
sql:limit-field sql:limit-value |
Allows limiting the values that are returned on the basis of a limiting value. |
Filtering Values Using sql:limit-field and sql:limit-value [SQLXML 4.0] |
Same |
sql:mapped |
Allows schema items to be excluded from the result. |
Excluding Schema Elements from the Resulting XML Document Using sql:mapped [SQLXML 4.0] |
map-field |
sql:max-depth |
Allows you to specify depth in recursive relationships that are specified in the schema. |
Specifying Depth in Recursive Relationships by Using sql:max-depth |
Not supported |
sql:overflow-field |
Identifies the database column that contains the overflow data. |
Retrieving Unconsumed Data Using the sql:overflow-field [SQLXML 4.0] |
Same |
sql:prefix |
Creates valid XML ID, IDREF, and IDREFS. Prepends the values of ID, IDREF, and IDREFS with a string. |
Creating Valid ID, IDREF, and IDREFS Type Attributes Using sql:prefix [SQLXML 4.0] |
Same |
sql:relation |
Maps an XML item to a database table. |
Same |
|
sql:relationship |
Specifies relationships between XML elements. The parent, child, parent-key, and child-key attributes are used to establish the relationship. |
Specifying Relationships Using sql:relationship [SQLXML 4.0] |
The attribute names are different: key-relation foreign-relation key foreign-key |
sql:use-cdata |
Allows specifying CDATA sections to be used for certain elements in the XML document. |
Same |
[!NOTA] The XSD native targetNamespace attribute replaces the target-namespace annotation that was introduced in the SQL Server 2000 XDR mapping schema.
Vedere anche
Riferimento
Specifying a Target Namespace Using the targetNamespace Attribute [SQLXML 4.0]