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Re: [Gzz] RDF and literals


From: Benja Fallenstein
Subject: Re: [Gzz] RDF and literals
Date: Mon, 03 Mar 2003 19:40:09 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20021226 Debian/1.2.1-9


Hei Matti!

Matti Katila wrote:
Can someone explain me the relationship with RDF's Object(literal) and zz cell's enfilade?

I'll try.

In zz/xu all was clear since you did implement the structure and cells actually didn't have anything like literals. Cell's container was actually a pointer to an enfilade. Data was in mediaserver until now when data is in literal and in storm? Confusing.

Ok, first of all: Everything will be in real RDF, i.e. triples of URIrefs, anonymous nodes, and literals. Xu storage will be built *on top of that*.

So we can have a literal with the following content (I'm making the XML tags up here):

    <alph:text uri="storm:block:482sanl3w24trg2" start="4" end="112"/>
    <alph:text uri="storm:block:21354sfdaay3244" start="43" end="148"/>

This is the string the literal contains.

Alph ('xustorm') will interpret this as an enfilade. It will read the Storm blocks referenced and take the Xanalogical data from there.

On the other hand, we will also be able to deal with literals like the following:

    2003-03-03T12:14:30Z

This represents a date in non-Xanalogical format.

We may show the date to a user as "3.3.03"-- and similarly, we may show the enfilade to a user as the text it contains.

Clearer now?

- Benja





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