Lecture 13

The various node tests also work on this axis: eg node() This book has descendant-or- self nodes As expected, text nodes are included in the counts this time

Xpath axes: the attribute axis This book has attribute nodes As expected, we are told that the books have no attributes Now, the current principal node type is attribute nodes; so the * matches attribute nodes

Xpath axes: the attribute axis again This book's title has attribute nodes As expected, we are told that each book title has 1 attribute

the attribute axis again: a different XML file This book's title has attribute nodes As expected, we are told that the book titles have differing numbers of attributes

abbreviated reference to the attribute axis This book's title has attribute nodes is an abbreviation for attribute::*

the preceding-sibling axis I found a node. It has preceding-sibling nodes.

the preceding-sibling axis and following-sibling axis I found a node. It has preceding-sibling nodes. It has following-sibling nodes. Note that each book now has an author element

combining the sibling axes I found a node. It has sibling nodes.

the namespace axis As stated earlier, an element has a namespace node –for every attribute on the element whose name starts with xmlns: ; –for every attribute on an ancestor element whose name starts xmlns: unless the element itself or a nearer ancestor redeclares the prefix; –for an xmlns attribute, if the element or some ancestor has an xmlns attribute, and the value of the xmlns attribute for the nearest such element is non-empty In addition, every element in an XML document automatically has a namespace node for the XML namespace

the namespace axis (contd.) This book is in the following namespaces:,

Various browsers treat the last example differently Try it yourself:

For a namespace node, name() returns the prefix but the string value of a namespace node is the URI This book is in the following name-spaces: =

Various browsers treat the last example differently Try it yourself: