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Subject: Re: [dita] Implementing a constraint with the RNG expression of the DITA 1.3 standard
We should definitely have examples of RNG constraints.
The constraint modules shipped with DITA 1.3 demonstrate the general techniques.
But fundamentally it's the same as for DTDs: you override the base declarations of the patterns.
Note that the current (unreleased but committed) state of the RNG to DTD generator automatically translates RNG <notAllowed> into the equivalent DTD entity declaration overrides as required for wholesale constraint of things defined in commonElements or topic.mod. This makes defining this type of constraint much easier since it does a whole bunch of cutting and pasting for you and then automatically omits those things that you've marked as not allowed.
Should I ever be able to actually get this code a releasable state it will very convenient...
Cheers,
E.
--
Eliot Kimber
http://contrext.com
ïOn 7/2/19, 12:33 PM, "Kristen James Eberlein" <dita@lists.oasis-open.org on behalf of kris@eberleinconsulting.com> wrote:
Yes, constraints can be expressed in RNG; RNG is the normative
form of the DITA grammar files. In fact, constraints are easier to
develop in in RNG than DTD!
The spec only contains examples of constraints in DTD, rather
than RNG, because that is what we had available and the
information that many people wanted.
TC members, should we consider reworking our constraints examples
to be in RNG rather than DTD? Or adding parallel examples with RNG
code?
Best,
Kris
Kristen James Eberlein
Chair, OASIS DITA Technical Committee
Principal consultant, Eberlein Consulting
www.eberleinconsulting.com <http://www.eberleinconsulting.com>
+1 919 622-1501; kriseberlein (skype)
On 7/2/2019 1:26 PM, Graydon Saunders
wrote:
In terms of the mechanics, certainly, and I will go post there.
In terms of whether it is possible to support constraints -- as
distinct from specializations -- in the RNG implementation, it
might be of interest to the technical committee.
Thanks!
Graydon Saunders
| Publishing Solutions Developer | Precision
Content
Direct: +1 (647)265-8500 x106| Email: graydon@precisioncontent.com | www.precisioncontent.com <https://www.precisioncontent.com>
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________________________________________
From:
dita@lists.oasis-open.org <dita@lists.oasis-open.org> <mailto:dita@lists.oasis-open.org> on
behalf of Kristen James Eberlein
<kris@eberleinconsulting.com> <mailto:kris@eberleinconsulting.com>
Sent: 02 July 2019 13:22
To: dita@lists.oasis-open.org
Subject: Re: [dita] Implementing a constraint with the
RNG expression of the DITA 1.3 standard
Graydon, this is perhaps a better post for the dita-users
list. The DITA TC list is for discussing the work of the DITA
Technical Committee.
Best,
Kris
Kristen James Eberlein
Chair, OASIS DITA Technical Committee
Principal consultant, Eberlein Consulting
www.eberleinconsulting.com <http://www.eberleinconsulting.com>
+1 919 622-1501; kriseberlein (skype)
On 7/2/2019 12:35 PM, Graydon
Saunders wrote:
Hello --
Using the RNG
implementation of the DITA 1.3 standard, I want to
constrain the li element
so that its content model permits only a p element.
I want to do this in such a way that as domain
specializations are added to document definitions,
those domain specializations will acquire this
constraint without any further changes being required.
How should I do this?
Thanks!
Graydon Saunders
| Publishing Solutions Developer | Precision
Content
Direct: +1 (647)265-8500
x106| Email: graydon@precisioncontent.com | www.precisioncontent.com <https://www.precisioncontent.com>
Unlock the
Knowledge in Your Enterpriseâ
This email and any files
transmitted with it are confidential and
intended solely for the use of the
individual or entity to whom they are
addressed. If you are not the intended
recipient you are notified that disclosing,
copying, distributing or taking any action
in reliance on the contents of this
information is strictly prohibited. Please notify us by return email if
you have received this email in error. Â2019, Precision
Content Authoring Solutions Inc,
Mississauga, Ontario, Canada
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