New Data Model has
Three Conceptual Building Blocks
- Trees made up of nodes (as in XPath 1.0)
- Atomic values (integers, string, booleans, etc.)
- Sequences of “items”
- an item is a reference to a node or an atomic value
- A single item is considered to be a sequence containing
one item
- A sequence cannot be a member of a sequence
(Why atomics and sequences? To represent intermediate results
during expression processing!)
