- From: Brian McBride <bwm@hplb.hpl.hp.com>
- Date: Thu, 19 Jul 2001 14:05:39 +0100
- To: rdf core <w3c-rdfcore-wg@w3.org>
I decided to take a pass through M&S to understand what it says about anon resources. I've made a list of sections which I found relevant which I've included here (almost) without comment, as crib sheet for others who wish to do the same. http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#33 Resources are always named by URIs plus optional anchor ids http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#34 Resources are identified by a resource identifier. A resource identifier is a URI plus an optional anchor id http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#41 The intention of this sentence is to make the value of the Creator property a structured entity. In RDF such an entity is represented as another resource. The sentence above does not give a name to that resource; it is anonymous, so in the diagram below we represent it with an empty oval: http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#44 The structured entity of the previous example can also be assigned a unique identifier. http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#52 If the resource does not yet exist (i.e., does not yet have a resource identifier) then a Description element can supply the identifer for the resource using an ID attribute. The structured entity of the previous example can also be assigned a unique identifier. http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#56 A Description element without an about attribute represents a new resource. Such a resource might be a surrogate, or proxy, for some other physical resource that does not have a recognizable URI. http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#100 http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#108 http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#132 This next paragraph is significant. It is describing the translation of the RDF/XML to the abstract syntax defined in M&S and describes a translation the resource in the abstract syntax has no identifier. http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#199 r is the resource whose identifier is given by the value of the about attribute of the Description or a new resource whose identifier is the value of the ID attribute of the Description, if present; else the new resource has no identifier. http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#205 The Description element itself represents an instance of a Bag resource. The members of this Bag are the resources corresponding to the reification of each of the statements in the Description. If the bagID attribute is specified its value is the identifier of this Bag, else the Bag is anonymous. http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#208 When aboutEachPrefix is specified with Description, the statements in the Description refer to each of the members of an anonymous Bag container. http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#232 r2 is the resource named by the resource attribute if present or a new resource. If the ID attribute is given it is the identifier of this new resource. http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#235 The value of the bagID attribute, if specified, is the identifier for the Bag corresponding to the Description D; else the Bag is anonymous. http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#244 http://lists.w3.org/Archives/Public/www-archive/2001Jun/att-0021/00-part#248 Brian
Received on Thursday, 19 July 2001 09:08:09 UTC