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- From: Len Bullard <email@example.com>
- To: David Power <firstname.lastname@example.org>
- Date: Mon, 18 Oct 1999 20:25:02 -0500
David Power wrote:
> One of our Directors has
> decided that XML is a great solution for our internal
> out-sourcing system.
Why is a great solution for outsourcing? Who (business role)
uses XML for what transaction?
> It is an SQL database that
> we render on browsers in HTML 4.0 using VB +
> uses IE 4.0 to view it (no probs).
SQL enables you via IIS and an ADO connection to
easily return HTML so you could skip the XML internally
unless you need to persist the data elsewhere. Is
the relational database the record of authority? Is
XML used to make copies of this data and reuse it
on another system other than internal clients?
> What is the advantage of using XML in this loop?
Do you persist XML on the client or the servers?
If not, not much. Essentially, IE4 and 5 treat XML
like it is a small object-database. You can use the
DOM to manipulate this, get information from schemas
for things such as standard GUIs, and otherwise keep
as much metadata as you want on the client side. You
can also store these properties on the relational side
as long strings amenable to slicing and dicing (eg, split())
etc. or as individual fields and get them on request. Loading them as
XML is a one time connection for some metadata sets,
so that is some advantage on the client side.
You can take very cheap databases engines such as
MS Access, link cross-department database applications,
and easily create intelligent namespace aggregates
simlar to recordset views (produced by, in fact)
that can be taken offsite or local to use as say,
diagnostic systems or acceptance test documents. Because
there are now XML applications for graphics such as
SVG and soon, real-time 3D animation (X3D), you can
do fascinating multi-applications aggregates bound
for just in time applications (the IETM as needed).
If I want to do loosely coupled enterprise work, there are some
distinct advantages in that you can use XML for import
and export (spoorMans serialization). These are hybrid
systems so, the answer is really, what do you need to
do with these tools? The data is manipulable and persistable
in both forms and readily interchangeable. The DOM/XML browser
is only a fair front-end for database manipulation, but it is
an excellent means to download and synchronize data for
occasionally-connected systems: say, anything on a Palm
unit or below.
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- Why XML?
- From: David Power <email@example.com>