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> What about a free ASN.1 to PER and back set of tools?
Well, you do not go from ASN.1 to PER and back just like you do not go from
XSD to XML and back. ASN.1 is the schema and PER is the transfer format.
The standard tool for formatting and parsing PER messages based on an ASN.1
schema is the ASN.1 compiler. Two open source compilers that I am familiar
with that can generate PER encoders/decoders can be found at the following
URL's:
http://www.openh323.org
http://sourceforge.net/projects/iiiasn1/
Regards,
Ed Day
Objective Systems, Inc.
----- Original Message -----
From: "Stephen D. Williams" <sdw@lig.net>
To: "Ed Day" <eday@obj-sys.com>
Cc: <rjm@zenucom.com>; <bob@wyman.us>; "'Bullard, Claude L (Len)'"
<clbullar@ingr.com>; "'Robin Berjon'" <robin.berjon@expway.fr>; "'xml-dev'"
<xml-dev@lists.xml.org>
Sent: Thursday, April 15, 2004 11:22 AM
Subject: Re: [xml-dev] RE: Why a "general" solution? (was: RE: [xml-dev]XML
Binary Characterization WG public list available e)
> What about a free ASN.1 to PER and back set of tools?
>
> Source code is required for all of these.
> There must be versions with source available for this approach to be
> viable IMHO, even if the 'good' solutions are commercial.
>
> sdw
>
> Ed Day wrote:
>
> >Hi Rick,
> >
> >Check out the following links:
> >
> >For XSD -> ASN.1 :
> >
> >http://asn1.elibel.tm.fr/en/tools/xsd2asn1/
> >
> >For ASN.1 -> XSD :
> >
> >http://www.obj-sys.com/freesoftware.shtml
> >
> >These are free to use, but not open source.
> >
> >Regards,
> >
> >Ed Day
> >Objective Systems, Inc.
> >
> >
> >----- Original Message -----
> >From: "Rick Marshall" <rjm@zenucom.com>
> >To: <bob@wyman.us>
> >Cc: "'Bullard, Claude L (Len)'" <clbullar@ingr.com>; "'Robin Berjon'"
> ><robin.berjon@expway.fr>; "'xml-dev'" <xml-dev@lists.xml.org>
> >Sent: Wednesday, April 14, 2004 7:05 PM
> >Subject: RE: [xml-dev] RE: Why a "general" solution? (was: RE:
[xml-dev]XML
> >Binary Characterization WG public list available e)
> >
> >
> >
> >
> >>bob
> >>
> >>is there an open source tool for converting xml to ans.1? and back too i
> >>guess.
> >>
> >>rick
> >>
> >>On Thu, 2004-04-15 at 05:41, Bob Wyman wrote:
> >>
> >>
> >>>Claude L Bullard wrote:
> >>>
> >>>
> >>>>If we follow this to a logical conclusion, I
> >>>>think we will end up with a binary-design
> >>>>toolkit, not a single binary.
> >>>>
> >>>>
> >>>I doubt it. For XML interop, we only need to worry about the
> >>>use of alternatives that are appropriate for use in the same domain in
> >>>which XML is useful. Thus, we don't have to worry about the *general*
> >>>problem of binary-format design. (i.e. there may be techniques that
> >>>are appropriate when designing something like jpeg but I don't think
> >>>we have to worry about XML interchange of image data any time soon.
> >>>(<pixel red="999" blue="333"...</pixel>)
> >>>For the domain in which XML is useful and thus XML interop is
> >>>meaningful, I am confident that we'll eventually "discover" that ASN.1
> >>>(either traditional or X.finfo) is sufficient to be the common binary
> >>>form. Thus, I would suggest that the XML community focus on interop
> >>>with ASN.1 and friends rather than trying to solve the general
> >>>binary-interop problem.
> >>>
> >>>One nice feature of accepting ASN.1 is it's name... It doesn't
> >>>include any "X"'s. Thus, you get compactness, speed of parsing, and
> >>>even patent protection! (i.e. no creative lawyer will be able to argue
> >>>that ASN.1 is just an alternative form of XML and is covered by the
> >>>growing number of XML specific patents...)
> >>>
> >>>bob wyman
> >>>
> >>>
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> >>>
> >>>
> >>>
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> >>
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> >>
> >
> >
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>
> --
> swilliams@hpti.com http://www.hpti.com Personal: sdw@lig.net http://sdw.st
> Stephen D. Williams 703-724-0118W 703-995-0407Fax 20147-4622 AIM: sdw
>
>
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