Hi, 

Have you looked into XOP for this?:

http://www.w3.org/TR/2005/REC-xop10-20050125/

I am not sure what kinds of implemenations are out there, but this looks =
like the sort of thing this standard was designed for. 

Regards, 

Ed Day
Objective Systems, Inc.
http://www.obj-sys.com


  ----- Original Message ----- 
  From: Shashikala Shamarao 
  To: Pete Cordell ; xmlschema-dev@w... 
  Sent: Thursday, September 29, 2005 12:03 PM
  Subject: Re: Image information in XML


  Hi Pete,

  Yes, I did figured out. But I still do not know how efficient it will =
be with regards to performance. That is for example, if we have lots of =
images in each document, we need to base64 encode the images and then =
compress it before embedding it into XML. I am currently testing this =
part to analyse the performance.

  Thanks again
  Shashi

  Pete Cordell <petexmldev@t...> wrote:

    Hi Shashi,

    Yes. You can compress the whole of the XML message with the image =
data 
    contained in it. Just looking at the JPEG part of a payload I did =
some 
    quick tests and it seems that compressing would compensate for the =
base64 
    expansion:

    JPEG file: 105,482 bytes (where , has its UK meaning)
    JPEG -> ZIP file: 105,417 bytes (implies JPEG is working well!)
    JPEG -> Base64 file: 144,346 bytes (includes some extra line feeds =
in 
    addition to 4/3 expansion)
    JPEG -> Base64 -> ZIP file: 109, 293 bytes

    This does show that compressing can get back much of what you loose =
by 
    Base64 encoding.

    Regards,

    Pete.
    --
    =
==========================
====================
    Pete Cordell
    Tech-Know-Ware Ltd
    for XML to C++ data binding visit
    http://www.tech-know-ware.com/lmx
    (or http://www.xml2cpp.com)
    =
==========================
====================

    ----- Original Message ----- 
    From: "Shashikala Shamarao" 
    To: "Pete Cordell" ; 
    Sent: Wednesday, September 28, 2005 10:56 PM
    Subject: Re: Image information in XML


    > Hi Pete,
    >
    > Thanks for the response. Is it possible to compress the data after =
it has 
    > been encoded.
    >
    > Thanks,
    > Shashi
    >
    > Pete Cordell wrote:
    >
    > Hi Shashi,
    >
    > The normal approach is to base64 encode binary data
    > (http://www.faqs.org/rfcs/rfc3548.html) (or hex encode). This does =
result
    > in some data expansion though. Every 3 bytes will be turned into =
4. I
    > don't know of any other solution that would work with a standard =
XML 
    > parser,
    > although some multiple file / out of band technique may work.
    >
    > Pete.
    > ----- Original Message ----- 
    > From: "Shashikala Shamarao"
    > To:
    > Sent: Wednesday, September 28, 2005 12:06 AM
    > Subject: Image information in XML
    >
    >
    >> Hi,
    >>
    >> Currently I am stuck with a problem realted to image in XML.
    >>
    >> I want to know how can I send image information in XML like =
below.
    >>
    >> My XML response should look like:
    >>
    >>
    >>
    >>
    >> contains binary data
    >>
    >>
    >>
    >> contains binary data
    >>
    >>
    >>
    >> contains binary data
    >>
    >>
    >>
    >>
    >>
    >> I looked at multipart MIME, these define a boundary at the =
begining say
    >> "bounary1" and at the end of every content whose mime type is =
different,
    >> boundary will be defined. What I am wondering is, is it possible =
to 
    >> define
    >> boundary for each element , so I can send the bit by bit
    >> information to the parser instead of waiting for the whole =
document to be
    >> created in memory and then sending it to parser?
    >>
    >> Any answers would be appreciated.
    >>
    >> Thanks in advance
    >> Shashi
    > --
    > =
==========================
====================
    > Pete Cordell
    > Tech-Know-Ware Ltd
    > for XML to C++ data binding visit
    > http://www.tech-know-ware.com/lmx
    > (or http://www.xml2cpp.com)
    > =
==========================
====================
    >
    >
    >
    >
    >
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