[dfdl-wg] Hello everybody!

[Yi Zhu[MSc]]

Hi all,

After discussing with my supervisors, I decided to take Susan's suggestion
(thank you ever so much Susan) and describe JPEG image files using the
subset of DFDL in my MSc projcet. Now I have some questions, could you
help me?

1. Do you think there are any particular JPEG test images I can use? I
tried to find on the Internet, but I can't probably because of the 
copyright.

2. I know that JPEG files have a clear structure (marker segments), but
different images also have some segments with different length
(coding segments). How can I use DFDL to describe these various segments?

3. I have downloaded the example from the working group website, but are
there any other examples based on real problems? I mean, for instance, an
example of describing a flat binary data file, or an example of describing
a database. And are there any examples of DFDL parsers or DFDL
applications?

Thank you very much!

Regards,
Yi     



On Tue, 26 Apr 2005, Susan Malaika wrote:

> How about considering the subset of DFDL that is useful for describing 
> JPEG metadata  or some other binary format that may be of interest in 
> EPCC? You could build some software that uses DFDL annotations as the 
> basis for processing JPEG metadata? You could make an assessment of your 
> findings in your dissertation and give feedback to the DFDL working group 
> .... 
> 
> First steps would be to look at JPEG metadata (if that seems suitable) and 
> look at the latest DFDL documents posted on the DFDL Website.
> 
> Susan Malaika 
> 
> 
> 
> 
> 
> "Yi Zhu[MSc]" <yizhu at epcc.ed.ac.uk> 
> 04/26/2005 03:55 PM
> 
> To
> Susan Malaika/Santa Teresa/IBM at IBMUS
> cc
> dfdl-wg at gridforum.org, owner-dfdl-wg at ggf.org
> Subject
> Re: [dfdl-wg] Hello everybody!
> 
> 
> 
> 
> 
> 
> Hi Susan,
> 
> Thank you very much. Yes, it is a 3 month project with programming and we
> have to submit a dissertation with roughly 15,000 words at the end of
> August. My supervisor gave me some advices about what to do: implementing
> a basic parser for a subset of the DFDL specification using Java, maybe
> via SAX and DOM respectively, and then benchmarking different
> performances. However, I have not decided which subset of DFDL I should
> work on because I have no idea among what I can choose. In addition, I
> haven't had a detailed view about what the DFDL can do and how it does it,
> I mean the annotation syntax for different problems, although I know it
> can define all kinds of data using the combination of the XML schema and
> DFDL annotations. Could you give me some advices?
> 
> Cheers,
> Yi
> 
> 
> On Tue, 26 Apr 2005, Susan Malaika wrote:
> 
> > Do you need help selecting or defining your DFDL project Yi? Is it a 3
> > month project? With programming? Do you have to write a thesis? A paper?
> > How many pages roughly?
> >
> > Susan Malaika
> >
> >
> >
> >
> > "Yi Zhu[MSc]" <yizhu at epcc.ed.ac.uk>
> > Sent by: owner-dfdl-wg at ggf.org
> > 04/26/2005 08:08 AM
> >
> > To
> > dfdl-wg at gridforum.org
> > cc
> >
> > Subject
> > [dfdl-wg] Hello everybody!
> >
> >
> >
> >
> >
> >
> > Hi,
> >
> > My name is Yi Zhu. I am a MSc student of EPCC, majoring in High
> > Performance Computing. I am here because my final project is about DFDL
> > (I am sorry for that as the project has just begun, what exactly will be
> > implemented has not been decided), and I believe this is a interesting,
> > challenging and promising field. However, I am a real beginer in DFDL, 
> so
> > I need all your help. Thanks ever so much!
> >
> > Regards,
> > Yi
> >
> >
> 
>