--- /dev/null
+<?xml version="1.0"?>
+
+<!-- Rdf Schema definition for theory files:
+xmlns:hth="http://www.cs.unibo.it/~schena/schema-hth#" -->
+
+<!DOCTYPE rdf:RDF [
+ <!ENTITY rdfns 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'>
+ <!ENTITY rdfsns 'http://www.w3.org/2000/01/rdf-schema#'>
+ <!ENTITY dcns 'http://www.cs.unibo.it/~schena/dces#'>
+ <!ENTITY dcqns 'http://www.cs.unibo.it/~schena/dcq#'>
+ <!ENTITY dctns 'http://www.cs.unibo.it/~schena/dctype#'>
+ <!ENTITY xschemans 'http://www.w3.org/1999/XMLSchema-datatypes#'>
+ <!ENTITY hthns 'http://www.cs.unibo.it/~schena/schema-hth#'>
+ <!ENTITY hns 'http://www.cs.unibo.it/~schena/schema-h#'>
+ ]>
+
+<rdf:RDF xml:lang="en"
+ xmlns:rdf="&rdfns;"
+ xmlns:rdfs="&rdfsns;"
+ xmlns:dc="&dcns;"
+ xmlns:dcq="&dcqns;"
+ xmlns:dct="&dctns;"
+ xmlns:xs="&xschemans;">
+
+<!-- RICORDA: specificare i contenuti dei dc elements: problemi con RSSDB -->
+<!-- RICORDA: aggiungi euler properties -->
+
+<!-- Description of Schema -->
+
+<rdf:Description rdf:about="&hthns;">
+ <rdfs:label>The HELM Element Set v0.1</rdfs:label>
+ <dc:title>The HELM Theory Element Set v0.1</dc:title>
+ <dc:publisher>The HELM Project</dc:publisher>
+ <dc:description>The HELM metadata vocabulary is a simple vocabulary
+ intended to facilitate discovery of mathematical resources.
+ </dc:description>
+ <dc:language>English</dc:language>
+ <dc:relation rdf:resource="http://ww.cs.unibo.it/helm/"/>
+ <dcq:isRequiredBy rdf:resource="&hns;"/>
+ <dcq:conformsTo rdf:resource="http://www.w3.org/RDF/"/>
+ <dcq:issued>2000-6-3</dcq:issued>
+ <dcq:modified>2002-9-6</dcq:modified>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Description>
+
+
+<!-- Classes -->
+
+<rdfs:Class rdf:about="&hthns;MathResource">
+ <rdfs:comment>Mathematical resources</rdfs:comment>
+ <rdfs:subClassOf rdf:resource="&rdfsns;Resource"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdfs:Class>
+
+<rdfs:Class rdf:about="&hthns;Theory">
+ <rdfs:comment>Mathematical resources represented by theories</rdfs:comment>
+ <rdfs:subClassOf rdf:resource="&hthns;MathResource"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdfs:Class>
+
+<rdfs:Class rdf:about="&hthns;TheoryItem">
+ <rdfs:comment>Theory items represented by: axiom, fact, definition, theorem, lemma, corollary, variable, specified by a XPath expression</rdfs:comment>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdfs:Class>
+
+<rdfs:Class rdf:about="&hthns;Contact">
+ <rdfs:comment>Creator contact information</rdfs:comment>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdfs:Class>
+
+<!-- Subclass of dcq:URI, dct:Text and dct:Software -->
+
+<rdfs:Class rdf:about="&hthns;HelmURI">
+ <rdfs:comment>HELM URIs of a mathematical resource. Subclass of dcq:URI
+which is an instance of the IdentifierScheme class</rdfs:comment>
+ <rdfs:subClassOf rdf:resource="&dcqns;URI"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdfs:Class>
+
+<rdfs:Class rdf:about="&hthns;HELMText">
+ <rdfs:comment>HELM File text types of a mathematical resource (possible
+values of the Dublin Core property type). Possible values of the rdf:about
+attribute can be: Abstract, Paper, Bibliography, HomePage, LectureNotes,
+Monograph, PatentSpec, Preprints, Proceedings, Review, Separatum, Serial,
+TechReport, Thesis, Enclosure, General. General describes a document not of
+the previous types. A helm theory has no type per se. Subclass of dcq:Text
+which is an instance of the TypeScheme class</rdfs:comment>
+ <rdfs:subClassOf rdf:resource="&dctns;Text"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdfs:Class>
+
+<rdfs:Class rdf:about="&hthns;HELMSoftware">
+ <rdfs:comment>HELM File software types of a mathematical resource
+(possible values of the Dublin Core property type). Possible values of the
+rdf:about attribute can be: Exec, Source. Subclass of dcq:Software
+which is an instance of the TypeScheme class</rdfs:comment>
+ <rdfs:subClassOf rdf:resource="&dctns;Software"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdfs:Class>
+
+<!-- Instances of dcq:FormatScheme and dcq:IdentifierScheme -->
+<!-- Instances are only for typing classes not for using. -->
+
+<dcq:FormatScheme rdf:about="&hthns;HelmFormat">
+ <rdfs:comment>Instance of the class FormatScheme to describe HELM File
+formats of a mathematical resource (possible values of the Dublin Core property
+format). Possible values of the rdf:about
+attribute can be XML.cic, XML.hol, XML.mizar. Each Helm format describes
+a logical framework. The class dcq:IMT contains values as text/xml, text/xhtml,
+text/mml, text/ps, text/tex, text/pdf.</rdfs:comment>
+ <rdf:type rdf:resource="&rdfsns;Class"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</dcq:FormatScheme>
+
+<dcq:IdentifierScheme rdf:about="&hthns;HelmID">
+ <rdfs:comment>Instance of the class IdentifierScheme to describe HELM
+identifiers</rdfs:comment>
+ <rdf:type rdf:resource="&rdfsns;Class"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</dcq:IdentifierScheme>
+
+<!-- SubProperties of dc:description, dc:creator, dc:relation and
+ hth:dependence -->
+
+<!-- There are also dcq:created and dcq:modified dc:date subProperties -->
+<rdf:Property rdf:ID="firstVersion">
+ <rdfs:comment>Any additional information about the first version of the
+mathematical resource</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&dcns;description"/>
+ <rdfs:domain rdf:resource="#MathResource"/>
+ <rdfs:range rdf:resource="&xschemans;string"/>
+</rdf:Property>
+
+<rdf:Property rdf:ID="modified">
+ <rdfs:comment>Any additional information about the modified version of the
+mathematical resource</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&dcns;description"/>
+ <rdfs:domain rdf:resource="#MathResource"/>
+ <rdfs:range rdf:resource="&xschemans;string"/>
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;institution">
+ <rdfs:comment>Affiliated institution of the creator of the mathematical
+resource</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&dcns;creator"/>
+ <rdfs:domain rdf:resource="&hthns;MathResource"/>
+ <rdfs:range rdf:resource="&xschemans;string"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;contact">
+ <rdfs:comment>Contact of the creator of the mathematical
+resource</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&dcns;creator"/>
+ <rdfs:domain rdf:resource="&hthns;MathResource"/>
+ <rdfs:range rdf:resource="#Contact"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;isBasedOn">
+ <rdfs:comment>A relation between mathematical resources</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&dcns;relation"/>
+ <rdfs:domain rdf:resource="&hthns;MathResource"/>
+ <rdfs:range rdf:resource="&hthns;HelmURI"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;isBasisFor">
+ <rdfs:comment>A relation between mathematical resources</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&dcns;relation"/>
+ <rdfs:domain rdf:resource="&hthns;MathResource"/>
+ <rdfs:range rdf:resource="&hthns;HelmURI"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;isSourceFor">
+ <rdfs:comment>A relation between mathematical resources</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&dcns;relation"/>
+ <rdfs:domain rdf:resource="&hthns;MathResource"/>
+ <rdfs:range rdf:resource="&hthns;HelmURI"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;hasSource">
+ <rdfs:comment>A relation between mathematical resources</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&dcns;relation"/>
+ <rdfs:domain rdf:resource="&hthns;MathResource"/>
+ <rdfs:range rdf:resource="&hthns;HelmURI"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;uses">
+ <rdfs:comment>A dependence between theory items (for instance: between a theorem or anything else and a variable)</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&hthns;dependence"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;isUsedBy">
+ <rdfs:comment>A dependence between theory items (for instance: between a variable and
+a theorem or anything else)</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&hthns;dependence"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;hasConsequence">
+ <rdfs:comment>A dependence between theory items (for instance: between a theorem and
+a corollary)</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&hthns;dependence"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;isConsequenceOf">
+ <rdfs:comment>A dependence between theory items (for instance: between a corollary
+and a theorem). Alternatively: IsResultOf</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&hthns;dependence"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;hasPremise">
+ <rdfs:comment>A dependence between theory items (for instance: between a theorem
+and a lemma)</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&hthns;dependence"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;isPremiseOf">
+ <rdfs:comment>A dependence between theory items (for instance: between a lemma
+and a theorem)</rdfs:comment>
+ <rdfs:subPropertyOf rdf:resource="&hthns;dependence"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<!-- Properties -->
+
+<rdf:Property rdf:about="&hthns;theoryItem">
+ <rdfs:comment>Theory item</rdfs:comment>
+ <rdfs:domain rdf:resource="&hthns;Theory"/>
+ <rdfs:range rdf:resource="&hthns;TheoryItem"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;dependence">
+ <rdfs:comment>Dependence between theory items</rdfs:comment>
+ <rdfs:domain rdf:resource="&hthns;TheoryItem"/>
+ <rdfs:range rdf:resource="&hthns;HelmID"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;itemType">
+ <rdfs:comment>Axiom, Fact, Definition, Theorem, Lemma, Corollary,
+Variable. Redundant info: it is already captured by the corresponding xml data</rdfs:comment>
+ <rdfs:domain rdf:resource="&hthns;TheoryItem"/>
+ <rdfs:range rdf:resource="&xschemans;string"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;label">
+ <rdfs:comment>Description of the kind of objects: data type,
+algorithm, specification, theorem containing algorithm, verification (that the
+implementation satisfies the specification), predicate/relation, proposition</rdfs:comment>
+ <rdfs:domain rdf:resource="&hthns;TheoryItem"/>
+ <rdfs:range rdf:resource="&xschemans;string"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<!-- ex. f:N->Z => N>->Z and n:Nat => n:Z -->
+<rdf:Property rdf:about="&hthns;isCoercion">
+ <rdfs:comment>A Definition item can be a coercion</rdfs:comment>
+ <rdfs:domain rdf:resource="&hthns;TheoryItem"/>
+ <rdfs:range rdf:resource="&xschemans;boolean"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<!-- The id info is no more contained in the theory xml doc, so there isn't
+redundant info between metadata and data -->
+<rdf:Property rdf:about="&hthns;ident">
+ <rdfs:comment>Identifier of a theory item</rdfs:comment>
+ <rdfs:domain rdf:resource="&hthns;TheoryItem"/>
+ <rdfs:range rdf:resource="&hthns;HelmID"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;email">
+ <rdfs:comment>E-mail of the creator of the mathematical
+resource</rdfs:comment>
+ <rdfs:domain rdf:resource="&hthns;Contact"/>
+ <rdfs:range rdf:resource="&xschemans;string"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<rdf:Property rdf:about="&hthns;address">
+ <rdfs:comment>Address of the creator of the mathematical
+resource</rdfs:comment>
+ <rdfs:domain rdf:resource="&hthns;Contact"/>
+ <rdfs:range rdf:resource="&xschemans;string"/>
+ <rdfs:isDefinedBy rdf:resource = "&hthns;" />
+</rdf:Property>
+
+<!-- HELM: Constraining an external (dc) property to a particular range and
+domain (hth:MathResource) should be possible. VRP gives a Warning when
+constraining (extending, adding constraints to) the range of a property
+defined in another schema (Consistency problems?No because it's an error
+modifying the original constraints): but where is the extensibility and
+reusability of RDF schemas? It's ok specializing a property with a
+subProperty. Anyway if the range of a property is not defined, VRP validates
+both if the property value is a resource, a class or a Literal.
+<rdf:Description rdf:about = "&dcns;type">
+ <rdfs:domain rdf:resource="&hthns;MathResource"/>
+</rdf:Description> -->
+
+</rdf:RDF>
projects / helm.git / blobdiff