@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix po: <http://www.essepuntato.it/2008/12/pattern#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

po:Block a owl:Class ;
    rdfs:label "block element"@en ;
    rdfs:comment "A document content nestable element."@en ;
    rdfs:isDefinedBy <http://purl.org/spar/po/> ;
    skos:note """
This class organise the document content as a sequence of nestable elements and text nodes. In particular, elements following this pattern can contain text and other elements compliant with the patterns Inline, Atom, Milestones and Popup, which will be introduced in the following. 
Furthermore, it is a requirement that block elements are contained only by container and popup elements
  """@en .