Your question is interesting, and my answer in two fold: a. about
Propery/@ValueRef, and b. about the NewsML1.2 evolution proposal.
a. You can indeed use Property/@ValueRef as a *pointer* (URL or URN) to
an external resource, that represents the value of the Property. This is
one of the extensibility mechanism provided in NewsML.
- given in the NewsML specs: <Property FormalName="Unit"
- with a URL <Property FormalName="RemoteArticle"
- with a TopicMap PSI: <Property FormalName="Language"
Note: I'm not convinced that any implementer did use this feature yet.
This can be used when you want to assign a Property a URL, or a URI
value taken from something else than a TopicSet. I imagine that the
original idea came from the TopicMap paradigm, where a literal value and
a resource are represented differently (something that doesn't exist in
Warning: on the other hand, there is a sentence in the specs (definition
of the FormalName attribute at the end) which states that:
"FormalName: A string of characters whose meaning is determined by a
naming scheme within a controlled vocabulary. The controlled vocabulary
may (but is not required to) take the form of a NewsML TopicSet."
So what is true for the FormalName attribute of many metadata elements =
it doesn't strictly have to be controlled by a TopicSet, should be also
true for the Value attribute of Property.
This to say that <Property FormalName="Language"
Value=...) should be an acceptable interpretation also.
About Origin, the problem is the same; the NewsML specs state that "the
Origin elements provide pointers to machine-interpretable data held
elsewhere, that conveys the same information as this human-readable
text." So this remote data can be is whatever format you want, even not
some "genuine NewsML" information.
b.!!!! Now the current proposal for evolution of NewsML - that didn't
raise high enthusiasm lately in this list - is different: it is not
about the values of metadata, but about the representation of metadata
The issue is: should we for example allow this, as a complement to
x:xaptk="XMP toolkit 2.8.2-33, framework 1.5">
<photoshop:CaptionWriter>np kr fob-ao</photoshop:CaptionWriter>
As chairman of the NewsML working support WP, I would be glad to receive
feelings of the NewsML implementers about this: what are the pros and
cons of this proposal? Should we do it in a minor evolution like
NewsML1.2, or wait for a major evolution (NewsML2.0)?
Laurent Le Meur
De : piriodista [mailto:pirio@...
Envoyé : mercredi 16 juillet 2003 16:40
À : firstname.lastname@example.org
Objet : [newsml] NewsML & external documental languages
I'm a research student interested in the use of NewsML from the point-
of-view of the information science. I've been studying NewsML for
some months and I have a question. I've been reading, among other
documents, the e-mail from Laurent Le Meur, and I rode:
> NewsML 1.2 proposed improvements currently are:
> Open the generic Metadata element to ANY content, thus
> transport of any set of metadata in a NewsML envelope in its native
> format (RDF, XMP, PRISM .). Note that the transport of extended
> is already possible via the Property element, but in a specific
> and using TopicSets; note also that such generic metadata sets
> opaque to standard NewsML compliant readers, as NewsML formalizes
> own standard metadata set.
So, does it mean that, in the NewsML 1.1 version, it's completely
impossible to use any description language that is not be made with
the NewsML syntaxis (with TopicSet) for applying this in any NewsML
Maybe you can find this question a little stupid, but I've read, in
the NewsML 1.1. Specification, refering to the attribute ValueRef of
the element Property:
"The ValueRef attribute gives a pointer to the value of the Property.
This might be a Topic in a TopicSet, or any other piece of data"
So, may this "any other piece of data" be a piece of data of a
metadata language that not use the NewsML format? If that's not true,
what's the possible meaning of this "piece of data"?
I have the same doubt with the element Origin: can it point to a
language not made with NewsML?
I apologize for my English. Thank you for reading it,
Universidad Carlos III de Madrid
Getafe (Madrid), Spain
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