[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

RE: A standard approach to glueing together reusableXML frag

• To: "'Dare Obasanjo'" <dareo@m...>,"'Jonathan Robie'" <jonathan.robie@d...>,"'Mike Champion'" <mc@x...>,<xml-dev@l...>
• Subject: RE: A standard approach to glueing together reusableXML fragments in prose?
• From: "Michael Kay" <michael.h.kay@n...>
• Date: Mon, 25 Aug 2003 20:18:43 +0100
• Importance: Normal
• In-reply-to: <830178CE7378FC40BC6F1DDADCFDD1D1173BA6@R...>
• Reply-to: <michael.h.kay@n...>

> Ah, yes. The main problems with the hierarchical model are 
> that it encourages data redundancy which leads to problems 
> during updates and deletions.

Wrong!

3rd normal form was about showing that you could move to a relational
representation of data without introducing redundancy. The problems with
hierarchical and network database systems were quite different: the lack
of declarative data manipulation languages with good closure properties,
the close coupling of the data model and its implementation in physical
storage, the consequent high cost of data loading and reorganization.

Another urban myth...

Michael Kay

• Follow-Ups:
  • RE: A standard approach to glueing together reusableXML fragments in prose?
    • From: pop3 <lbradshaw@d...>
  • Re: A standard approach to glueing together reusableXML fragments in prose?
    • From: "Jeff Tash" <tash@f...>
  • RE: A standard approach to glueing together reusableXML fragments in prose?
    • From: Murali Mani <mani@C...>

• References:
  • RE: A standard approach to glueing together reusableXML fragments in prose?
    • From: "Dare Obasanjo" <dareo@m...>

• Prev by Date: RE: A standard approach to glueing together reusableXML fragments in prose?
• Next by Date: RE: A standard approach to glueing together reusableXML fragments in prose?
• Previous by thread: XQuery updates and unnormalized data (RE: A standard approach to glueing together reusableXML fragments in prose?)
• Next by thread: RE: A standard approach to glueing together reusableXML fragments in prose?
• Index(es):
  • Date
  • Thread