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The feature 'mixed' of **** with 2 element values must have exactly 1 element value [message #530968]

Mon, 03 May 2010 08:36

Jens Mising name

Messages: 12
Registered: March 2010
Location: Berlin

Junior Member

Hello,

I have an xsd which I used to generate model code using EMF (Eclipse 3.5 - EMF 2.5.0).
I can load and save XML files successfully but came across this message when I tried to implement the schema validation.

The xml file which I am trying to validate includes a comment like this:
<?xml version="1.0" encoding="ISO-8859-15"?>

<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
...

Now, the comment generates the validation message (see title) but I don't really understand what it means.

I tried to google it to get an idea but only found code from buckminster which seems to simply exclude these type of error messages:
http:// dev.eclipse.org/viewsvn/index.cgi/branches/Platform-3.5.x/or g.eclipse.buckminster.aggregator.engine.maven/src/org/eclips e/buckminster/aggregator/engine/maven/POM.java?view=markup&a mp;root=Tools_BUCKMINSTER&pathrev=10975

I would appreciate if someone (with better knowledge on EMF than me - and that is obviously easy) could give me a pointer.

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Re: The feature 'mixed' of **** with 2 element values must have exactly 1 element value [message #530982 is a reply to message #530968]

Mon, 03 May 2010 09:14

Ed Merks

Messages: 33142
Registered: July 2009

Senior Member

Jens,

This was fixed with bugzilla 295011. Comments at the root shouldn't
count as more than one root element...

Jens Helweg wrote:
> Hello,
> I have an xsd which I used to generate model code using EMF (Eclipse
> 3.5 - EMF 2.5.0). I can load and save XML files successfully but came
> across this message when I tried to implement the schema validation.
> The xml file which I am trying to validate includes a comment like
> this: <?xml version="1.0" encoding="ISO-8859-15"?>
> 
> <root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
> ..
>
> Now, the comment generates the validation message (see title) but I
> don't really understand what it means.
>
> I tried to google it to get an idea but only found code from
> buckminster which seems to simply exclude these type of error
> messages:
> http://dev.eclipse.org/viewsvn/index.cgi/branches/Platform-3 .5.x/org.eclipse.buckminster.aggregator.engine.maven/src/org /eclipse/buckminster/aggregator/engine/maven/POM.java?view=m arkup&root=Tools_BUCKMINSTER&pathrev=10975
>
>
> I would appreciate if someone (with better knowledge on EMF than me -
> and that is obviously easy) could give me a pointer.

Ed Merks
Professional Support: https://www.macromodeling.com/

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Re: The feature 'mixed' of **** with 2 element values must have exactly 1 element value [message #530987 is a reply to message #530968]

Mon, 03 May 2010 09:24

Jens Mising name

Messages: 12
Registered: March 2010
Location: Berlin

Junior Member

I have searched for the error message in the source code and found that the root element of the xml file must apparently contain only one element.
At least the properties key "_UI_DocumentRootMustHaveOneElement_diagnostic" indicates this.

I guess the question remains: How do then allow comments in my xml file (at this position)?

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