Mike
The new document looks good, the descriptions
of the property values are clear and simple.
One comment of yours I need to follow
up though. You said:
" Bug
in this doc. Daffodil is not inserting defaults here (doesn’t implement
default insertion when parsing.) Fixed
with new language you suggested. "
Are you saying that if Daffodil parses
an occurrence and determines it has the empty rep, and there is a default
value on the element declaration, that the default value is not used? If
so then what happens? Further, if you subsequently change Daffodil
so it does use the default value, you have silently changed parsing behaviour
in an incompatible way. IBM DFDL similarly does not use default values
when parsing, but to prevent a future incompatible behaviour change, if
we find a zero-length occurrence and there is a default value, we throw
a runtime SDE.
Regards
Steve Hanson
IBM Hybrid Integration, Hursley, UK
Architect, IBM
DFDL
Co-Chair, OGF
DFDL Working Group
smh@uk.ibm.com
tel:+44-1962-815848
mob:+44-7717-378890
Note: I work Tuesday to Friday
From:
Mike Beckerle <mbeckerle.dfdl@gmail.com>
To:
Steve Hanson <smh@uk.ibm.com>
Cc:
DFDL-WG <dfdl-wg@ogf.org>
Date:
16/10/2019 19:19
Subject:
[EXTERNAL] Re:
[DFDL-WG] New Experimental Feature document: dfdl:emptyElementParsePolcy
I have revised this per your comments, and uploaded a
new revision. Link: https://redmine.ogf.org/dmsf_files/13596?download=
Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology
| www.tresys.com
Please note: Contributions to the DFDL Workgroup's email
discussions are subject to the OGF
Intellectual Property Policy
On Wed, Oct 16, 2019 at 12:23 PM Steve Hanson <smh@uk.ibm.com>
wrote:
Mike
Some significant comments on this.
Regards
Steve Hanson
IBM Hybrid Integration, Hursley, UK
Architect, IBM
DFDL
Co-Chair, OGF
DFDL Working Group
smh@uk.ibm.com
tel:+44-1962-815848
mob:+44-7717-378890
Note: I work Tuesday to Friday
From: Mike
Beckerle <mbeckerle.dfdl@gmail.com>
To: DFDL-WG
<dfdl-wg@ogf.org>
Date: 14/10/2019
19:58
Subject: [EXTERNAL]
[DFDL-WG] New Experimental Feature document: dfdl:emptyElementParsePolcy
Sent by: "dfdl-wg"
<dfdl-wg-bounces@ogf.org>
Per one of our trackers I uploaded an "official" document to
describe this experimental feature.
gwde-dfdl-experience-7-emptyElementParsePolicy.docx
This describes the feature as we have implemented it in Daffodil. There
has been some discussion on this proposal already, particularly on whether
the enum values for the property are appropriately chosen so that they
clearly identify the different behaviors.
Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | www.tresys.com
Please note: Contributions to the DFDL Workgroup's email discussions are
subject to the OGF
Intellectual Property Policy
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Unless stated otherwise above:
IBM United Kingdom Limited - Registered in England and Wales with number
741598.
Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6
3AU