Interpreting relative references in OPC

[MURATA Makoto]

Rex,

BOTH ABSOLUTEpath references and RELATIVE path references are RELATIVE
references.
See "4.2.  Relative Reference" in RFC 3986.   XPS does use relative
references.  XPS
implementations appear to use relative references that begin with "/".

Regards,
Makoto


2012/5/18 Rex Jaeschke <rex at rexjaeschke.com>:
> As the liaison between OpenXML and OpenXPS, I forwarded Murata-san's mail
> below to the XPS folks. Below is the response I received from the Ecma TC46
> chairman, Brian Clubb.
>
> Rex
>
>
> -----Original Message-----
> From: Brian Clubb [mailto:Brian.Clubb at microsoft.com]
> Sent: Thursday, May 17, 2012 2:02 PM
> To: Rex Jaeschke
> Subject: RE: Interpreting relative references in OPC
>
> Rex,
>
> This seems to be incorrect.  OXPS requires relative URIs (see sections
> 9.1.2, 9.1.3, 9.1.4, 10 of spec).  Microsoft's XPS allowed either relative
> or absolute paths.  I am concerned they are looking at the wrong kind of XPS
> file here.
>
> Thanks!
> Brian
>
>
>
> -----Original Message-----
> From: eb2mmrt at gmail.com [mailto:eb2mmrt at gmail.com] On Behalf Of MURATA
> Makoto
> Sent: Tuesday, May 15, 2012 9:35 PM
> To: SC34
> Subject: Interpreting relative references in OPC
>
> Dear colleagues,
>
> If my memory is correct, resolution of relative references within OPC is an
> issue.
> ODF and EPUB both did reasonably good jobs.
>
> EPUB3 http://idpf.org/epub/30/spec/epub30-ocf.html#sec-container-iri
> ODF 1.2
> http://docs.oasis-open.org/office/v1.2/os/OpenDocument-v1.2-os-part3.html#__
> RefHeading__752821_826425813
>
> In my understanding, after unzipping OPC, every relative reference will be
> broken, and this has not caused any real problems.  But, in EPUB3, unzipping
> do not break relative references except for those in the META-INF directory,
> which is only for packaging.
> This is also intentional, since synergy with the Web world and the e-book
> world is highly important for EPUB.  I am not sure about ODF 1.2.
>
> Interestingly, XPS implementations always appear to use absolute-path
> references (which always begin with "/") as references, while OOXML
> implementations appear to use relative-path references (which do not begin
> with "/").
>
>
> Regards,
> Makoto
>
>
>
>



-- 

Praying for the victims of the Japan Tohoku earthquake

Makoto