## XML ontology
## specified in Libretto
## version 2010-04-02
##


# "x" is the default prefix of the XML ontology in Libretto 
ontology x "http://xml.ontobox.org/"; 

# the general class of an XML document node
class x:Node;

# the 'feature' classes
class x:Namespace {
    x:prefix[0,1] {xsd:string},
    x:uri[0,1] {xsd:string}
};

class x:Named {
    x:ns[0,1] {x:Namespace},
    x:name[0,1] {xsd:string}
};

class x:Container {
    x:content {x:Node}
};

# the main XML document components
class x:Text extends x:Node {
    x:text[0,1] {xsd:string}
};

class x:Attribute extends x:Named {
    x:value[0,1] {xsd:string}
};

class x:Element extends x:Named, x:Container, x:Node {
    x:attributes {x:Attribute}
};

class x:Comment extends x:Node {
    x:comment[0,1] {xsd:string}
};

class x:CDATA extends x:Text;

# the class of an XML document 
class x:Document extends x:Container {
    x:root[0,1] {x:Element}
};