Can't format XQuery with group by clause using ":="

Issues related to W3C XQuery.
Martin Honnen
Posts: 30

Can't format XQuery with group by clause using ":="

Mon Oct 16, 2017 2:32 pm

I have the following as an ".xq" file in oXygen XML Editor 19.1, build 2017092911

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for $item in Base/Item
group by $id := $item/Id
order by $id
return <Item>
  {for $marked in $item[Mark]
    group by $mark  := $marked/Mark
    return <Marked name="{$mark}">

When I try to format that code with the format and indent button I get an error

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System ID: C:\SomePath\test2017101602.xq
Severity: error
Description: Cannot format the document. Encountered " ":=" ":= "" at line 2, column 14.
Was expecting one of:
    <WS> ...
    "," ...
    "stable" ...
    "order" ...
    "collation" ...
    "count" ...
    "where" ...
    "return" ...
    "as" ...
    "for" ...
    "let" ...
    "group" ...
    ":)" ...
Start location: 2:13
Length: 1

Looking at and the grammar

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GroupingSpec      ::=      GroupingVariable (TypeDeclaration? ":=" ExprSingle)? ("collation" URILiteral)?

it appears to me the syntax is fine. And oXygen runs the query without problems, the problem is simply that it does not manage to format it.
Posts: 5338

Re: Can't format XQuery with group by clause using ":="

Mon Oct 16, 2017 3:45 pm

Hi Martin,

This is a bug in our XQuery format and indent facility, I will log an internal issue for this and we'll update this thread when a fix is available.
Hopefully we'll be able to integrate a fix in a future Oxygen 19.1 minor bug fix release (we make such small bug fix releases about once a month).

Radu Coravu
<oXygen/> XML Editor
Posts: 156

Re: Can't format XQuery with group by clause using ":="

Fri Jan 05, 2018 3:30 pm


Just to update the thread, in the latest maintenance build of Oxygen 19.1, 2017121318 (released on December 13th) the e XQuery Format and Indent was improved:
XQuery: Improved the XQuery Format and Indent to take into account all XQuery 3.1 constructs when indenting.

You can download it from our web site:

The list of bug-fixes can be found here:

You can follow the release/build RSS feed here:

Let us know if you encounter further problems with this new build.

Ionela Istodor
oXygen XML Editor and Author Support

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