Change - RDF Container

Created on Feb. 18, 2013, 11:58 a.m. by Hevok & updated on March 29, 2013, 10:11 a.m. by Hevok

There are different kind of cContainers in RDF. In a sequential container there is an ordered list of elements, thus the order is of somehow importance. On the other hand if there is simple a collection and it should represent and unordered set where the order has no importance at all then a rdf:Bag is defined. It should be simple of type rdf:Bag and the order has no relevance. Another possibility is a third kind of collection where one has to choice among all of these elements just one then one defines an RDF alternative, rdf:Alt. ¶
¶
* the rRoot nNode of the container is assigned a cContainer-type via rdf:type. ¶
¶
- rdf:Bag ¶
¶
+ unordered set of elements, ¶
+ there is no given order of elements ¶
¶
- rdf:Seq ¶
¶
+ ordered set of elements ¶
¶
- rdf:Alt ¶
¶
+ defines alternatives of eElements ¶
+ only one element of the given alternatives is relevant for the Application ¶
¶
For a RDF Sequence, Blank nodes need to be stated to be of type list, i.e. rdf:Seq, which means Sequential List where the order of the items matters. The properties from this Blank Node are enumerated with rdf:_1, rdf:_2, etc. ¶
¶
In Turtle after defining some prefixes that are required to the necessary URIs, the beginning of the Blank Node bracket is followed by defining that it is of type a rdf:Seq; and the items in the list separated by semicolon defined by their URI. ¶
¶
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-synthax-nx#>] . ¶
@prefix ev: <http://denigma.de/events>] . ¶
@base <http://denigma.de/>] . ¶
¶
:swt ev:hasParticipants [ ¶
a rdf:Seq; ¶
rdf:_1 <Hevok> ¶
rdf:_2 <EVA> ¶
] ¶
¶
Such a list can afterward be extended. ¶
¶