I can imagine the "date accessed" being an attribute of the URL, rather
than being treated as an attribute of the citation as a whole. You may
also have a bibliographic date on the item. So if I cite a web page that
has a copyright date of 2002, but I access that page on May 3, 2003,
then the date of the cited document is 2002, but I am authenticating the
URL only as of May 3, 2003. In a sense, this latter date often
substitutes for a date of publication when the document itself gives no
indication of a publication date, but in fact it is information about
the URL in my mind. The publication would actually be "n.d." in library
parlance -- "no date."

kc

On Fri, 2003-08-29 at 06:58, Rebecca S. Guenther wrote:
> Date Valid is for describing a resource that has date-sensitive
> information. Examples are a train schedule which is only valid beginning
> on a certain date or a law that will go into effect on a given date.
>
> On the second question, I was going to answer the same way that Suzanne
> did. The record describes a given resource with an identifier. The
> resource was accessed on a particular date and is being described in terms
> of how it appeared on that date. So is there really a need to link them?
> The only situation I can think of when you might want to associate the
> date with an identifier is if you are giving more than one URI and you
> accessed them on different dates-- maybe a mirror site or something. If
> people think it important to enable linking the dateAccessed with the
> identifier, we could use the ID and IDref constructs available in XML as
> attributes to dateAccessed and Identifier, which would provide a linking
> mechanism.
>
> Rebecca
>
> On Thu, 28 Aug 2003, Bruce D'Arcus wrote:
>
> > On Thursday, August 28, 2003, at 05:18  PM, Rebecca S. Guenther wrote:
> >
> > > It has been suggested that MODS include a date of access. The example
> > > given was for bibliographic citations. The Chicago Manual of Style
> > > includes an access date for an electronic resource (i.e. date it was
> > > last accessed, since Web sites change frequently) in standard
> > > bibliographic citations. This is different from dateModified, which is
> > > being added to MODS in version 3.0, in that dateModified tells you
> > > date that the resource was last changed, while date accessed would
> > > tell you when it was last viewed or accessed and makes no claims about
> > > when it was last modified.
> >
> > What is the purpose of dateValid then?
> >
> > > Are there any thoughts about adding another date to MODS? Under
> > > originInfo it would be dateAccessed. It then would use the dateType
> > > definitions.
> >
> > Question: how would one then couple the access date with a specific
> > URL, since each would be contained in different elements?
> >
> > Bruce
> >