[OASIS Issue Tracker] (XDI-11) 3.4.1 - Clarification

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

    [ https://issues.oasis-open.org/browse/XDI-11?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=40666#comment-40666 ] 

Joseph Boyle  commented on XDI-11:
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Q1: It's saying, we can say that an XDI address must start with a root, because if there isn't an explicit other root in parens, we can consider that there is an initial zero-length string which can be interpreted as the common root.

In a Unix or HTTP path, the / character is both root symbol and term separator, but in XDI the context symbols =+*! or "context function" delimiters ()[]<>{} are enough to function as term separators, while / is used to separate the addresses of a triple or inner root instead. (can we refer to them as "pairs"?). 

In a Unix path you indicate it's a relative path (starting from sessions's current directory, instead of an "absolute path" starting from root) by omitting the root symbol /. In XDI you would instead indicate a path starts somewhere other than common root, by explicitly including one or more parenthesized root expressions before the rest of the address. 

Q2: It is addressable as empty string, per first sentence. In a statement or inner root, the slashes and parentheses separate the slots, so that an empty slot is possible.


> 3.4.1 - Clarification
> ---------------------
>
>                 Key: XDI-11
>                 URL: https://issues.oasis-open.org/browse/XDI-11
>             Project: OASIS XRI Data Interchange (XDI) TC
>          Issue Type: Task
>          Components: XDI Core
>    Affects Versions: 1.0
>            Reporter: Hubert Le Van Gong
>            Assignee: Hubert Le Van Gong
>
> "The XDI address of the common root node is the empty address. Thus any XDI statement that does not begin with a peer root address or an inner root address is by definition relative to the common root node."
> Q1: does this imply that such statement (per 2nd sentence) has an empty address?
> Q2: as I read this, I wondered how the 2nd sentence doesn't contradict the 100% addressability goal (for the object node)? 



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