XQuery 4.0 - Revision history

Holu at 13:35, 16 November 2023

2023-11-16T13:35:18Z

Holu at 12:50, 16 November 2023

2023-11-16T12:50:51Z

Holu at 19:35, 14 November 2023

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Holu at 18:52, 31 October 2023

2023-10-31T18:52:15Z

Holu at 18:50, 31 October 2023

2023-10-31T18:50:52Z

Holu: Created page with "This article is part of the XQuery Portal. It provides a summary of the most important features of the [https://qt4cg.org/specifications/xpath-functions-40/Overview..."

2023-10-31T18:21:19Z

Created page with "This article is part of the XQuery Portal. It provides a summary of the most important features of the [https://qt4cg.org/specifications/xpath-functions-40/Overview..."

New page

This article is part of the [[XQuery|XQuery Portal]]. It provides a summary of the most important features of the [https://qt4cg.org/specifications/xpath-functions-40/Overview.html XPath and XQuery Functions and Operators 4.0] W3C Editor's Draft.

=Otherwise operator=

<code>
$a otherwise $b
</code>

… is equivalent to …

<code>
if(exists($a)) then $a else $b
</code>

=Braced if, optional else=


<code>
if($a) { $b } else { $c }
</code>



<code>
if($a) { if($b) { $c } }
</code>


=Arrow map operator=


<code>
"The cat sat on the mat" 
=> tokenize() 
=!> concat(".") 
=!> upper-case() 
=> string-join(" ")
</code>


=Numeric literals=

<code>1_048_576</code>
<code>0xFC00</code>
<code>0b111000</code>

=Abbreviated function syntax=

<code>let $inc := fn($n) { $n + 1 } return $inc(99)</code>

… is equivalent to …

<code>let $inc := function($n) { $n + 1 } return $inc(99)</code>

=Focus functions (arity-one)=

<code>let $inc := fn { . + 1 } return $inc(99)</code>

<code>fn:filter($integers, fn { . > 5 })</code>

<code>fn:iterate-while($number, fn { . < 100 }, fn { . * . })</code>

=Maps=

20 new map functions have been added in [https://qt4cg.org/specifications/xpath-functions-40/Overview.html#maps XPath and XQuery Functions and Operators 4.0], namely

<ul>
<li><code>fn:atomic-equal</code></li>
<li><code>map:build</code></li>
<li><code>map:contains</code></li>
<li><code>map:entries</code></li>
<li><code>map:entry</code></li>
<li><code>map:filter</code></li>
<li><code>map:find</code></li>
<li><code>map:for-each</code></li>
<li><code>map:get</code></li>
<li><code>map:keys</code></li>
<li><code>map:merge</code></li>
<li><code>map:of-pairs</code></li>
<li><code>map:pair</code></li>
<li><code>map:pairs</code></li>
<li><code>map:put</code></li>
<li><code>map:remove</code></li>
<li><code>map:replace</code></li>
<li><code>map:size</code></li>
<li><code>map:substitute</code></li>
<li><code>map:values</code></li>
</ul>

Map functions are described in [https://docs.basex.org/wiki/Map_Module Map Module].

=Arrays=

30 new array functions have been added in [https://qt4cg.org/specifications/xpath-functions-40/Overview.html#array XPath and XQuery Functions and Operators 4.0], namely

<ul>
<li><code>array:append</code></li>
<li><code>array:build</code></li>
<li><code>array:empty</code></li>
<li><code>array:exists</code></li>
<li><code>array:filter</code></li>
<li><code>array:flatten</code></li>
<li><code>array:fold-left</code></li>
<li><code>array:fold-right</code></li>
<li><code>array:foot</code></li>
<li><code>array:for-each</code></li>
<li><code>array:for-each-pair</code></li>
<li><code>array:get</code></li>
<li><code>array:head</code></li>
<li><code>array:index-where</code></li>
<li><code>array:insert-before</code></li>
<li><code>array:join</code></li>
<li><code>array:members</code></li>
<li><code>array:of-members</code></li>
<li><code>array:put</code></li>
<li><code>array:remove</code></li>
<li><code>array:replace</code></li>
<li><code>array:reverse</code></li>
<li><code>array:size</code></li>
<li><code>array:slice</code></li>
<li><code>array:sort</code></li>
<li><code>array:split</code></li>
<li><code>array:subarray</code></li>
<li><code>array:tail</code></li>
<li><code>array:trunk</code></li>
<li><code>array:values</code></li>
</ul>

Array functions are described in [https://docs.basex.org/wiki/Array_Module Array Module].

=Changelog=

;Version 11.0

* Added {{Code|otherwise}} operator

@@ Line 130: / Line 130: @@
 new array functions have been added in [https://qt4cg.org/specifications/xpath-functions-40/Overview.html#array XPath and XQuery Functions and Operators 4.0], namely
-<ul>
+* [[Array_Module#array:build|{{Code|array:build}}]]
-<li>[https://docs.basex.org/wiki/Array_Module#array:build <code>array:build</code>]</li>
+* [[Array_Module#array:foot|{{Code|array:foot}}]]
-<li><code>array:foot</code></li>
+* <code>array:members</code>
-<li><code>array:members</code></li>
+* <code>array:of-members</code>
-<li><code>array:of-members</code></li>
+* <code>array:replace</code>
-<li><code>array:replace</code></li>
+* <code>array:slice</code>
-<li><code>array:slice</code></li>
+* <code>array:split</code>
-<li><code>array:split</code></li>
+* <code>array:trunk</code></li>
 array function has been updated:
@@ Line 154: / Line 152: @@
 * Added operator {{Code|otherwise}}
-* Added map function <code>map:build</code>
+* Added function <code>map:build</code>
-* Added map function <code>map:filter</code>
+* Added function <code>map:filter</code>
-* Added map function <code>map:of-pairs</code>
+* Added function <code>map:of-pairs</code>
-* Added map function <code>map:pair</code>
+* Added function <code>map:pair</code>
-* Added map function <code>map:replace</code>
+* Added function <code>map:replace</code>
-* Added map function <code>map:substitute</code>
+* Added function <code>map:substitute</code>
-* Added array function <code>array:build</code>
+* Added function [[Array_Module#array:build|{{Code|array:build}}]]
-* Added array function <code>array:foot</code>
+* Added function [[Array_Module#array:foot|{{Code|array:foot}}]]
-* Added array function <code>array:members</code>
+* Added function <code>array:members</code>
-* Added array function <code>array:of-members</code>
+* Added function <code>array:of-members</code>
-* Added array function <code>array:replace</code>
+* Added function <code>array:replace</code>
-* Added array function <code>array:slice</code>
+* Added function <code>array:slice</code>
-* Added array function <code>array:split</code>
+* Added function <code>array:split</code>
-* Added array function <code>array:trunk</code>
+* Added function <code>array:trunk</code>

@@ Line 62: / Line 62: @@
 <p style="white-space: pre-wrap;padding: 1em; border: 1px solid #eaecf0; background-color: #f8f9fa; color: #000; font-family: monospace;">declare function strings:get(
     $value,
-    $default <span style="color:#C00000">:= "EMPTY"</span>) {
+    $default <span style="color:#C00000">:= "EMPTY"</span>
-     $value otherwise $default
+ ) {
+  }
   strings:get('john')

@@ Line 29: / Line 29: @@
 =Arrow map operator=
-<p>
+<p style="white-space: pre-wrap;padding: 1em; border: 1px solid #eaecf0; background-color: #f8f9fa; color: #000; font-family: monospace;">"The cat sat on the mat"
-<code>
+ => tokenize()
-"The cat sat on the mat"<br/>
+ <span style="color:#C00000">=!></span> concat(".")
-=> tokenize()<br/>
+ <span style="color:#C00000">=!></span> upper-case()
-<span style="color:#C00000">=!></span> concat(".")<br/>
+ => string-join(" ")
 </p>
@@ Line 60: / Line 57: @@
 <p><code>fn:iterate-while($number, <span style="color:#C00000">fn { . </span> < 100 <span style="color:#C00000">}</span>, <span style="color:#C00000">fn { . </span> * <span style="color:#C00000">. }</span>)</code></p>
 =Maps=

@@ Line 113: / Line 113: @@
 =Maps=
 new map functions have been added in [https://qt4cg.org/specifications/xpath-functions-40/Overview.html#maps XPath and XQuery Functions and Operators 4.0], namely
 <ul>
 <li><code>map:build</code></li>
 <li><code>map:filter</code></li>
 <li><code>map:of-pairs</code></li>
 <li><code>map:pair</code></li>
 <li><code>map:replace</code></li>
 <li><code>map:substitute</code></li>
 </ul>
@@ Line 142: / Line 128: @@
 =Arrays=
 new array functions have been added in [https://qt4cg.org/specifications/xpath-functions-40/Overview.html#array XPath and XQuery Functions and Operators 4.0], namely
 <ul>
 <li><code>array:build</code></li>
 <li><code>array:foot</code></li>
 <li><code>array:members</code></li>
 <li><code>array:of-members</code></li>
 <li><code>array:replace</code></li>
 <li><code>array:slice</code></li>
 <li><code>array:split</code></li>
 <li><code>array:trunk</code></li>
-<li><code>array:values</code></li>
+</ul>
 </ul>
@@ Line 183: / Line 153: @@
 ;Version 11.0
-* Added {{Code|otherwise}} operator
+* Added operator {{Code|otherwise}}