office-collab — archive

[Robin LaFontaine <robin.lafontaine@deltaxml.com>]

On 09/09/2011 01:38, John Haug wrote: 91C4760493E4094B9871E5A496374DA23B1ED599@DF-M14-02.exchange.corp.microsoft.com type= cite > If there are any specific problems with ECT, I'd love to have the details as both Doug and I noted early on that we think arbitrary order rejection is important to users. I believe the issue can be illustrated in the example below. Doc-v0: <style:style style:name= Style1 style:family= paragraph >       <style:text-properties fo:font-weight= normal /> </style:style> Doc-v1: <style:style style:name= Style1 style:family= paragraph >       <style:text-properties fo:font-weight= normal fo:font-style= italic /> </style:style> Doc-v2: <style:style style:name= Style1 style:family= paragraph >       <style:text-properties fo:font-weight= bold fo:font-style= italic /> </style:style> Change 1 (doc-v0 to doc-v1) adds fo:font-style= italic and so caches <style:style style:name= Style1 style:family= paragraph >       <style:text-properties fo:font-weight= normal /> </style:style> and has: <ct:format-change-start ct:id= 1 /> <style:style style:name= Style1 style:family= paragraph >       <style:text-properties fo:font-weight= normal fo:font-style= italic /> </style:style> <ct:format-change-end ct:id= 1 /> Change 2 (doc-v1 to doc-v2) changes fo:font-weight= normal to fo:font-weight= bold and so caches <style:style style:name= Style1 style:family= paragraph >       <style:text-properties fo:font-weight= normal fo:font-style= italic /> </style:style> and has: <ct:format-change-start ct:id= 2 /> <style:style style:name= Style1 style:family= paragraph >       <style:text-properties fo:font-weight= bold fo:font-style= italic /> </style:style> <ct:format-change-end ct:id= 2 /> Then if you reject 2 then reject 1 it works OK, but reject 1 then reject 2 would result in: <style:style style:name= Style1 style:family= paragraph >       <style:text-properties fo:font-weight= normal fo:font-style= italic /> </style:style> which is incorrect because fo:font-style= italic remains there although change 1 has been rejected. I believe the situation is that for ECT any two changes that affect one 'bucket' can only be rejected correctly in the reverse order, i.e. if the last change is rejected first. Of course a user does not know anything about buckets so this may lead to confusing behaviour. This is one reason for my opinion that recording changes to attributes is important. Robin -- -- ----------------------------------------------------------------- Robin La Fontaine, Director, DeltaXML Ltd Change control for XML T: +44 1684 592 144 E: robin.lafontaine@deltaxml.com http://www.deltaxml.com Registered in England 02528681 Reg. Office: Monsell House, WR8 0QN, UK