31 Mar
2009
31 Mar
'09
1:09 p.m.
Hello Guillaume,
Thanks a lot for your quick answer.
2009/3/31 Guillaume Lerouge <guillaume(a)xwiki.com>
wikis
Great , I just had a look at the source code and I am delighted to see that
it's exactly what I have been doing during these last 3 month as
part of Compiler Construction Code with professor *Hanspeter Mössenböck*.I
wrote a compiler for a simplifier java looks like language.
The idea is more or less the same here,
I will give more details about how I plan to do it in my proposal.
It could be helpfull for me if I could have some feedback from Asiri.
alright
thank you Guillaume.
Keerthan
.
Hi Keerthan,
On Tue, Mar 31, 2009 at 1:21 AM, Keerthan MUTHURASA <
muthurasa.keerthan(a)gmail.com> wrote:
any
____________________________________________________________________________________________________________
http://dev.xwiki.org/xwiki/bin/view/GoogleSummerOfCode/ImportExportfromanyo…
mode
____________________________________________________________________________________________________________
rather
> than subparts, thus links would be preserved. If you want to let users
> import/export only subarts of a wiki (such as a space or a single page),
be
means
be
wiki
it
regarding
source
Thanks a lot I am having a look at MediaWIki Export format.I will setup
Confluence as well.
Hello,
Many thanks for all these helpfull details.
2009/3/30 Guillaume Lerouge <guillaume(a)xwiki.com>
> Hi Keerthan,
>
> thanks for your interest in XWiki & the GSoC. I'll try answering some
of
your
questions below.
> On Sat, Mar 28, 2009 at 9:30 PM, Keerthan MUTHURASA <
> muthurasa.keerthan(a)gmail.com> wrote:
>
> > Hello,
> >
> > I am Keerthan Muthurasa , Msc Software Engineering student at Oxford
> > Brookes
> > University , I am interested on
> > doing a project for xwiki.
> >
> > I would like to discuss about my ideas for the "Import Export from other
Wiki Project" and if you could in return give me your opinions
that would be really helpfull for me.
This is the project requirement :
Import Export from any other
Wiki<
>
>
>
> Create a extensible framework to import export data between wikis.
This
> > should handle converting the data in the pages including
> > links between pages and metadata as well as direct access to the data
> > through either a web service (prefered) or database or the
> > file system
> >
> > The system should at least for MediaWiki and Confluence in import > >
> > I will begin with some questions:
> >
> > * What does it mean when talking about converting links between pages
(
we
> are talking about converting internal links in the source wiki isn it
?,
That's mean when importing or exporting data we should think about
exporting
or importing the linked data as well in order to keep an integrity).
Indeed. Most of the time, the use case will be to import a full wiki > you
> should provide them with a warning that some links will be broken
rather
> than trying to import all pages that are
linked to. Or you could make
> importing liked to pages an option. It could result in surprised users
if
someone
tries to export / import one page and ends up with the 76 pages
that
page linked / was linked to ;-)
I understand, I will keep in mind these details.
>
> Since the most common use case is to import a full wiki, it shouldn't much of
an issue.
> * What does it mean when talking about exporting metadata ,direct
access
to
when
data through either a web service or database or
file system ?
Some metadata can be conserved across systems. For instance, the date the page was created, its edition date and its
previous versions might
need
> to be preserved (if that's technically feasible). Thus it basically taking
care of all the information associated with the page other than
its
> content.
>
> > Here my idea for the project , if I can have some feedback it would helpfull for me:
When exporting or importing data from a given wiki to a
destionation
> one
> Setp 1: get rid of all specific synthax proper to the source > and retrieve data,metadata, and other
usefull information.This can be
> achieved
> using a kind of parser whose job is to scan the
source
> page and reconize the specific synthax and
only retrieve proper
> data.Concerning encountered links ,we should
> convert theses pages as well but we have to be
carefull
> when cross linked ( for instance we are
converting page A and A links
to
> B
> > but when
> > converting B ,B links to A).
>
>
> You could start by looking at the XWiki 2.0 syntax and see everything > allows. I think that when trying to convert
pages from other wikis
> (specifically Confluence) you will run in the following issue: some
pages
use
macros that are defined elsewhere on the system and won't work
correctly
when imported in XWiki.
I already had a look at Xwiki 2.0 syntax.
For pure content, you should be able to import it
all in XWiki without
much
of a problem. For content generated by a script,
you could try to
identify
it and then issue warnings in your output such as
"this is specific
content
that couldn't be converted".
See my answer above about retrieving the content of linked to pages.
I had a look at some of the previous threads in the mailling list import / export feature.
>
> > Step 2: adopt a datacentric approach to properly store data in
a
> > such a way that is easy to retrieve
them.We have to be carefull when
> > storing
> > data
> > since they have to keep the original pages
structure.
Have you already looked at the content of a MediaWiki, Confluence and
XWiki
export file?
Nop, I did not but I had a litle idea about the format since several
parsers ( XWikiParser , MediaWikiParser ...) are dealing with DOM.
Where Can I get these differents exported files ? What is the usual case
when getting this files ? Are we using any export utilities from the wiki in order to get an xml format file ? I will
investigate on that for
MediaWiki and Confluence.
You can download Confluence from this page:
http://www.atlassian.com/software/confluence/ConfluenceDownloadCenter.jspato
install it locally and play with it a bit. You could specifically give
a
look to http://confluence.atlassian.com/display/DOC/Confluence+to+XML .
Similar documentation is probably available from MediaWiki as well but
you'll have to look it up by yourself ;-)
In
XWiki's case, data is stored in a XML format. It might be
the same for Confluence & MediaWiki. If it is, you might be able to use
XSLT
to convert one XML format to another.
I had a look at some of your previous discussion concerning the export /
import feactures.
If I properly understood:
XWikiParser => Transform XWiki format text into a DOM representation
MediaWikiRenderer => Render a MediaWiki format text from a DOM
representation
MediaWikiParser => Transform MediaWiki format text into a DOM
representation
XWikiRenderer => Render a XWiki format text from a DOM representation
Using the same idea it's possible to do the same think for any other if we aware of this wiki's syntax.
Within the wikiModel I found some references to
org.wikimodel.wem.xwiki.XWikiParser
org.wikimodel.wem.mediawiki.MediaWikiParser
org.wikimodel.wem.jspwiki.JspWikiParser
org.wikimodel.wem.creole.CreoleWikiParser
Where can I find the source code for these elements ?
http://code.google.com/p/wikimodel/source/browse/#svn/trunk/org.wikimodel.w…
There were some issues concerning incompatible
syntax between wikis in
the
discussion.Specially
issues concerning syntax that can exist in some wiki and does not exist
on
other.(Example of confluence that is quite
restrictive ,macro problem as
refered by Guillaume). Are they any solutions found for this kind of
issues
or should you just warn that some information
will be ommited ?
I think that trying to convert everything is too idealistic. In the case of
the Office Importer, content that cannot be converted properly is stripped
and warnings are issued for unsupported macros for instance. I'll let Asiri
tell you more about the Office Importer conversion behavior if needed.
As far as I can see there are works already done
for export / import
feature
so what's wrong with the existing work ? There are a lot of changes
betweeen
xWiki 1.0 and 2.0 syntax.I guess XWikiParser and XWikiRenderer has been
modified according to these changes ?
XWiki 1.0 syntax was using the Radeox parser while XWiki 2.0 syntax is
using
WikiModel. You would definitely be working with WikiModel a lot, improving
WikiModel's Confluence & MediaWiki syntax parsers so that they can
eventually issue XDOM elements. To finish with my long list of questions ( sorry
about that , I am just
trying to understand the existing work), Can I have an use case for
importing data from Confluence to xWiki ? ( from getting input data file
to
expected result in xWiki).
You can get an input file from the Confluence instance you will have
installed on your machine. You can also give a look to XE 1.8 default XAR
(available to download from XWiki.org) to see what the expected result
looks
like Guillaume
Many thanks again for your answer.
Best regards,
Keerthan Muthurasa
Msc Software Engineering,
School of Technology,
Oxford Brookes University
also
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Guillaume Lerouge
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> Step 3: use previously retrieved data to create the result page
in
the
destination wiki using the wiki specific synthax for destination
wiki.
See my answer above.
> I am having a look at wikiModel that seems to contain a parser.I am trying to
understand Plexus.
A Many thanks for your advices.
Hope this helps,
Guillaume
Regards,
Keerthan Muthurasa
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Guillaume Lerouge
Product Manager - XWiki
Skype ID : wikibc
http://guillaumelerouge.com/
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