Contains the definition of a notation to describe the format of non-XML data within an XML document. An XML Schema notation declaration is a reconstruction of XML 1.0 NOTATION declarations.
<notation
id = ID
name = NCName
public = Public identifier per ISO 8879
system = anyURI
{any attributes with non-schema Namespace}…>
Content: (annotation?)
</notation>
Optional.
The name must be unique within a schema.
Required.
Required.
Optional.
| Number of occurrences | Unlimited |
| Parent elements | schema |
| Contents | annotation |
The following example shows a jpeg notation using a viewer application, viewer.exe.
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:notation name="jpeg" public="image/jpeg" system="viewer.exe" />
</xs:schema>
XML Schema Reference (XSD) | XML Schema Elements
For more information, see the W3C XML Schema Part 1: Structures Recommendation at http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#element-notation.

W3C Namespaces in XML Recommendation