An XML Schema Document must have exactly one schema element. The start-tag for the simplest schema element might look like:

CREATE SCHEMA will enter a new schema into the current database. The schema name must be distinct from the name of any existing schema in the current database.

The Vancouver XML Developers Association (VanX) is a group of software developers in Vancouver, Canada who have a keen interest in Extensible Markup Language (XML) and related technologies.

To simplify the sample abstract plan examples, the following tables are used in this section:

Occurs in Schema Tutorial examples:
Keyref

Occurs in Schema Tutorial examples:
nillable, xsi:nil
Unique and nillable

Simple OML is also known as Core OML. The core aspect of OML centers on a fundamental Classification Projection Diagram. The main goal for Simple OML is to represent the semantics of this diagram.

Schema Evolution Examples Adding Data Members This example is the classic situation
where a new piece of information needs to be maintained in an object.

CREATE SCHEMA will enter a new schema into the current database. The schema name must be distinct from the name of any existing schema in the current database.

All relational databases store information about themselves in a collection of non-standard system tables. These internal system tables contain meta-data, i.e. data about objects in the database. Mimer has always discouraged users from writing queries directly against the system tables because the table structure is subject to change.

Occurs in Schema Tutorial examples: Document root element can be from a set of namespaces
.

Occurs in Schema Tutorial examples: Document root element can be from a set of namespaces
.

Occurs in Schema Tutorial examples: Document root element can be from a set of namespaces
.

Occurs in Schema Tutorial examples:
Attribute contains a list of values
Element contains a list of values

Occurs in Schema Tutorial examples:
Target namespaces are the same (non-null)
Including document has non-null target namespaces, included null
target namespace

Occurs in Schema Tutorial examples:
Abstract element, substitutionGroup
Attribute block
Abstract type

Occurs in Schema Tutorial examples:
Uniqueness
Key
Uniqueness - comparison of numbers
Unique and nillable
Keyref

In the opening pages of "The XML Schema Complete Reference," the authors raise, then answer, the questions "Why XML?" and "Why XML schemas?" The authors devote the remainder of the book to helping software developers learn two vital skills: how to create an XML schema and how to integrate it into an existing application.

Occurs in Schema Tutorial examples: Attribute block Attribute block set to "restriction"
Attribute block set to "extension" Combining block and blockDefault

Occurs in Schema Tutorial examples: Document root element can be from a set of namespaces
.