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https://issues.apache.org/jira/browse/WICKET-4153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13133640#comment-13133640
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Sander Plas commented on WICKET-4153:
-------------------------------------

@Martin: the idea behind my patch was that it at least gives the user the 
*possibility* to generate valid XHTML or HTML4 in case of 0 records by adding a 
toolbar like NoRecordsToolbar. Just following the HTML5 spec makes this 
impossible without having to modify/subclass DataTable. 

@All: this doesn't mean that i have very strong feelings about this; any 
decision on this matter is fine with me :-) 
                
> The tbody section of a DataTable is empty when no records are returned by the 
> provider.
> ---------------------------------------------------------------------------------------
>
>                 Key: WICKET-4153
>                 URL: https://issues.apache.org/jira/browse/WICKET-4153
>             Project: Wicket
>          Issue Type: Bug
>          Components: wicket-extensions
>    Affects Versions: 1.5.1
>            Reporter: Bertrand Guay-Paquet
>            Priority: Trivial
>              Labels: datatable
>             Fix For: 1.5.3
>
>         Attachments: DataTable-usePlainTR.diff, DataTable.patch, 
> DataTableTest-usePlainTR.diff, good.png, with_patch.png, without_patch.png
>
>
> When a DataTable is rendered without records, the tbody section is empty. 
> This violates the html spec.
> From the spec:
> "When present, each THEAD, TFOOT, and TBODY contains a row group. Each row 
> group must contain at least one row, defined by the TR element."
> and
> "The THEAD, TFOOT, and TBODY sections must contain the same number of 
> columns."

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