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Preliminaries

In the following, we provide basic definitions used throughout the documentation, that are intended to aid understanding of the language elements.1

  • A string, number, boolean, or null is called atomic node (e. g. 1, 'hello', true), an object or array is called structured node (e. g. {a:1}, [1,2]).
  • A node is either an atomic or structured node.
  • A sequence (of nodes) is an ordered collection of zero or more nodes.
  • A sequence consisting of exactly one node is called a singleton. A node is identical to a singleton that contains that node.
  • A sequence with zero nodes is called an empty sequence.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. We partly align to the xpath terminology. ↩