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https://issues.apache.org/jira/browse/JENA-1088?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15072270#comment-15072270
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Bruno P. Kinoshita commented on JENA-1088:
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Added a simple trim in the HTML input field value, just before its value is 
serialized and sent to the server layer.

Adding dataset names with spaces still displays a server error message in a 
bottom panel on the UI, but I think that's fine.

I tried to remove the old datasets, that had several spaces, and the UI didn't 
work (I could delete other datasets like /books, /test). So I think this simple 
validation may prevent some issues from being reported here, but in the future 
we may have to add/modify the rules according to issues/bugs and user reports.

> Fuseki 2 allows duplicate datasets when using only spaces in name
> -----------------------------------------------------------------
>
>                 Key: JENA-1088
>                 URL: https://issues.apache.org/jira/browse/JENA-1088
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: Fuseki
>            Reporter: Bruno P. Kinoshita
>            Assignee: Andy Seaborne
>              Labels: web
>         Attachments: JENA-1088.png, Jena-1088-AFS-1.patch
>
>   Original Estimate: 2h
>          Time Spent: 2h
>  Remaining Estimate: 0h
>
> Was testing Fuseki 2, before reviewing the docs, and decided to experiment a 
> few things. Looks like if you use just spaces in the dataset name, you are 
> allowed to create a new one, and it gets the name "/". Which is fine.
> But if you try that again with another random number of spaces, it inserts 
> another dataset with the same name.



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