December 2015
Intermediate to advanced
762 pages
19h 13m
English
Content preview from XQuery, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapter 2. XQuery Foundations
This chapter provides a brief overview of the foundations of XQuery: its design, its place among XML-related standards, and its processing model. It also discusses the underlying data model behind XQuery and the use of types and namespaces in queries.
The Design and History of the XQuery Language
The XML Query Working Group of the World Wide Web Consortium (W3C) began work on XQuery in 1999. It used as a starting point an XML query language called Quilt, which was itself influenced by two earlier XML query languages: XQL and XML-QL.
The working group set out to design a language that would:
Be useful for both highly structured and semi-structured documents
Be protocol-independent, allowing a query to be evaluated on any system with predictable results
Be a declarative language rather than a procedural one
Be strongly typed, allowing queries to be “compiled” to identify possible errors and to optimize evaluation of the query
Allow querying across collections of documents
Use and share as much as possible with appropriate W3C recommendations, such as XML, Namespaces in XML, XML Schema, and XPath
The XQuery recommendation and related supporting standards include over 15 separate documents and over 1,000 printed pages. These documents are listed (with links) at the public XQuery website at http://www.w3.org/XML/Query. The various recommendation documents are generally designed to be used by implementers of XQuery software, and they vary in readability and accessibility. ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.