[OASIS Issue Tracker] (XDI-23) 4.3 $is

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    [ https://issues.oasis-open.org/browse/XDI-23?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44452#comment-44452 ] 

Joseph Boyle  commented on XDI-23:
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Question: We still use parentheses for roots or xrefs, so is () still legal, and if so does it turn out to still be synonymous with common root, or does it mean something else? 

> 4.3 $is
> -------
>
>                 Key: XDI-23
>                 URL: https://issues.oasis-open.org/browse/XDI-23
>             Project: OASIS XRI Data Interchange (XDI) TC
>          Issue Type: Bug
>          Components: XDI Core
>    Affects Versions: 1.0
>            Reporter: Hubert Le Van Gong
>            Assignee: Drummond Reed
>              Labels: Plenary
>
> $is is for (inversed) relational statements while $is() is for contextual statements.
> Is this correct?
> Why is the distinction needed?



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