XML Demystified

CHAPTER 4 XML Schema
You define your own attributes for an element by using the xs:attribute tag. This
tag also requires that you specify a name of the attribute, which is assigned to the
name attribute, and a type attribute, which is the data type of the attribute. Optionally,
you can define a default value, define a fixed value, and indicate whether the
attribute is required or optional.
A facet is a valid value that can be assigned to an attribute. You define facets by
using the xs:restriction and xs:enumeration tags. The xs:restriction tag states there
are restrictions imposed on the attribute, and the xs:enumeration tag specifies those
restrictions. You can set restrictions in the form of a range of values or specify more
complex restrictions by using a regular expression.
You can create your own data type as either simpleType or complexType. You
use a simpleType when defining one element, and a complexType when defining
multiple elements.
Quiz
1. An XML schema is used to define a complex type.
a. True
b. False
2. type=“integer” means
a. The content of an element is the word integer.
b. All types except integers can be used in the corresponding element.
c. Only integers can be used in the corresponding element.
d. None of the above.
3. xmlns:xs=“http://www.w3.org/2001/XMLSchema” is used to
a. Identify ownership of the XML schema
b. Identify ownership of the XML document
c. Identify the XML schema specifications used in the XML schema
d. Identify that this is an XML schema
4. The xs:sequence tag
a. Specifies the sequence in which elements must appear in an XML
document
b. Specifies the sequence in which elements must appear in an XML
schema
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