XPath v1

Location paths Understand the syntax of XPath expressions.
Use the following elements in XPath expressions:

• Axis specifiers: ancestor, ancestor-or-self, attribute, child, descendant, descendant-or-self, following, following-sibling, namespace, parent, preceding, preceding-sibling, self.
• This includes the "/", "//" and predicate "[..]" operators
• Abbreviated and expanded syntax.
  

Expressions Use the following operators in XPath expressions:

• Union operator "|".
• Boolean operators "and" and "or", and the function "not()"
• Arithmetic operators "+", "-", "*", "div" and "mod"
• Comparison operators "=", "!=", "<", ">", "<=", ">="

Core Functions Use, in XPath expressions, functions that:

• Manipulate strings: concat(), substring(), contains(), substring-before(), substring-after(), translate(), normalize-space(), string-length()
• Manipulate numbers: sum(), round(), floor(), ceiling()
• Get properties of nodes: name(), local-name(), namespace-uri()
• Get information about the processing context: position(), last()
• Convert types: string(), number(), boolean()