Introduction to boolean XSD

Boolean XSD is a data type in XML Schema Definition (XSD) that can take only two values, true or false. It is a frequently used data type that represents the truth values of logic and decision-making.

Syntax

In XSD, the boolean data type is declared using the following syntax:

<xs:simpleType name="boolean">
  <xs:restriction base="xs:boolean"/>
</xs:simpleType>

Attributes

The boolean XSD type has no attributes of its own, but it inherits all the attributes of the xs:boolean type. These attributes are:

• default: Specifies a default value for the element.
• fixed: Specifies a fixed value that cannot be changed.

Example

Here is an example of an XML element that uses the boolean XSD type:

<xs:element name="isReady" type="xs:boolean"/>

This element can have a value of either true or false.

Boolean Operators

In addition to representing truth values, boolean values can also be used in logical and comparison operations. XSD provides several boolean operators that can be used on boolean values. These include:

• and: Returns true if both operands are true.
• or: Returns true if either operand is true.
• not: Returns true if the operand is false.
• xor: Returns true if one, but not both, operands are true.

Conclusion

Boolean XSD is a simple yet versatile data type that is widely used in XML documents. It can represent the truth values of logic and decision-making and can be used in various logical and comparison operations.