XQuery
XQuery is a query and functional programming language that queries and transforms collections of structured and unstructured data, usually in the form of XML, text and with vendor-specific extensions for other data formats (JSON, binary, etc.). The language is developed by the XML Query working group of the W3C. The work is closely coordinated with the development of XSLT by the XSL Working Group; the two groups share responsibility for XPath, which is a subset of XQuery.
XQuery 1.0 became a W3C Recommendation on January 23, 2007.
XQuery 3.0 became a W3C Recommendation on April 8, 2014.
Features
XQuery is a functional, side effect-free, expression-oriented programming language with a simple type system, summed up by Kilpeläinen:
XQuery provides the means to extract and manipulate data from XML documents or any data source that can be viewed as XML, such as relational databases or office documents.
XQuery contains a superset of XPath expression syntax to address specific parts of an XML document. It supplements this with a SQL-like "FLWOR expression" for performing joins. A FLWOR expression is constructed from the five clauses after which it is named: FOR, LET, WHERE, ORDER BY, RETURN.
Take It Shake It
"What is it that you want?" I get that a lot in my
travels.
I look up at the sky, and the answer is, "Only my
heart."
The really important words aren't so easy to say.
The place that the light points to, I run towards it.
If it's really something you want so much that it makes
you cry inside.
Just keep at it and for sure you'll take it someday.
The white clouds float by, heading towards the horizon.
Because the future that's set for us is always close to
I may have cleared the first step, but that's not the
end of it.
There'll be endless more starting today, maybe even
some meet with tears.
If you get tired after working your hardest, you can do
something besides work hard.
The seemingly empty, sleepy night, will come to life.
If you really want to get there, giving up sometimes is
fine.
Even the tears that are welling up, you'll shake it
someday.
Because there are things we'll never give up, we can be
steadfast. Thank you my dream.
Somewhere along the infinity of time, we'll find
happiness.
If it's really something you want, so much that it
makes you cry inside.
Just keep at it and for sure you'll take it someday.
The white clouds float by, heading towards the horizon.
Because the future that's set for us is always close to