1. Dan McCreary October, 2008 Version 0.2
XQuery Data Model
Dan McCreary
October, 2008
Version 0.2

2. Overview
Review the underlying data structures use in XQuery and the terminology
Review the types for atomic data types

3. UML Notation Review Aggregation (containment) Subtypes (inheritance)
Recipe
Ingredient
Aggregation (containment)
1..N
Animal
Subtypes (inheritance)
Mammal
Reptile

4. UML Diagram Notation A Sequence contains 0 to many items Sequence Item

5. Two Subtypes of Items
Item
Node
Atomic value
There are two sub-types of items. Nodes and atomic values.

6. Six Subtypes of Node There are six subtypes of nodes
Attribute
Comment
Element
Document PI
Text
There are six subtypes of nodes
Comments and PIs are rare

8. Range limits for some times

9. Key

10. References http://www.w3.org/TR/xmlschema-2