[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Grooves: why are "data" designed as properties and not nodes ?
Thanks for the clarifications, I think Im getting a feel for how groves works. However my initial question remains, why are "data" located in properties and not nodes. If actual "data" where to be moved into Nodes the Grove model would still be well defined and maybe even simpler to understand and work with. A alternative definition would be something like this: * A Grove instance consists of Nodes and Properties. * A Property is a directed and named relation between Nodes. * A Property relates a single Node to one or more Nodes (nodelist) * Nodes are instances of a NodeClass * NodeClasses fall into two broad categories, ContainerNodeClasses, LeafNodeClasses * NodeClasses are described by Schemas (PropertySets) * NodeClasses are described by the Properties it may exhibit. * Node instances of LeafClasses exhibit no properties except intrinsic properties * LeafNodes exhibit a value according to its class. Types of values are integer's, string,float ,etc. * ... intrinsic property ... data property ... * ... intrinsic property ... content property ... * ... groove plan ... In this definition the "data" is folded into the same type system as Nodes. (in the Grove definition there are two type systems, classes and declared datatypes) I also found an interesting sentence in the A.4 Property Set Definition Requirements (PSDR) document in section A.4.1.2: "... A property has a "declared datatype" which specifies the type of value nodes are permitted to exhibit for the property. ...." So maybe I can interpret/implement Property *value nodes* a Nodes anyway without violate the grove specification (if "declared datatype" is intepreted as class). What Im really trying to find out is if the choice of putting "data" in properties or nodes is a "coin toss" desision or if there are any theoretical or practical reasons to select either design. Regards /Anders /_/_/_/_/_/_/_/_/_/_/_/_/_/_/ / Financial Toolsmiths AB / / Anders W. Tell / /_/_/_/_/_/_/_/_/_/_/_/_/_/_/ xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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