There are different kind of Containers 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 Root Node of the container is assigned a Container-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 Elements
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 ;
rdf:_2 .
] .
Such a List can afterwards be extended.