Swish.RDF.Vocabulary

This module defines some commonly used vocabulary terms, using the Namespace and ScopedName data types. Additional vocabularies are available in the set of Swish.RDF.Vocabulary.* modules, parts of which are re-exported by this module

Namespaces

namespaceRDFD :: Namespace

Maps rdfd to http://id.ninebynine.org/2003/rdfext/rdfd#.

namespaceXsdType

Arguments

:: LName

local name

-> Namespace

Namespace has prefix xsd_lbl and URI of http://id.ninebynine.org/2003/XMLSchema/lbl#.

Create a namespace for the datatype family schema used by Swish.

namespaceMATH :: Namespace

Maps math to http://www.w3.org/2000/10/swap/math#.

namespaceLOG :: Namespace

Maps log to http://www.w3.org/2000/10/swap/log#.

namespaceDAML :: Namespace

Maps daml to http://www.daml.org/2000/10/daml-ont#.

namespaceDefault :: Namespace

Maps default to http://id.ninebynine.org/default/.

namespaceSwish :: Namespace

Maps swish to http://id.ninebynine.org/2003/Swish/.

RDF rules

The namespaces refer to RDF rules and axioms.

scopeRDF :: Namespace

Maps rs_rdf to http://id.ninebynine.org/2003/Ruleset/rdf#.

scopeRDFS :: Namespace

Maps rs_rdfs to http://id.ninebynine.org/2003/Ruleset/rdfs#.

scopeRDFD :: Namespace

Maps rs_rdfd to http://id.ninebynine.org/2003/Ruleset/rdfd#.

Language tags

Support for language tags that follow RFC 3066.

This replaces the use of ScopedName and langName, langTag, and isLang in versions prior to 0.7.0.0.

data LanguageTag

Represent the language tag for a literal string, following RFC 3066 http://www.ietf.org/rfc/rfc3066.txt.

Use toLangTag to create a tag and fromLangTag to convert back. The case is preserved for the tag, although comparison (both the Eq instance and compareLangTag) is done using the lower-case form of the tags.

As an example:

 Prelude> :set prompt "swish> "
 swish> :set -XOverloadedStrings
 swish> :m + Swish.RDF.Vocabulary
 swish> let en = "en" :: LanguageTag
 swish> let us = "en-us" :: LanguageTag
 swish> let gb = "en-GB" :: LanguageTag
 swish> gb
 en-GB
 swish> gb == "en-gb"
 True
 swish> en == us
 False
 swish> en `isBaseLang` us
 True
 swish> us `isBaseLang` en
 False
 swish> us `isBaseLang` gb
 False

Instances

Eq LanguageTag

The equality test matches on the full definition, so en-GB does not match en. See also isBaseLang.

Ord LanguageTag

Show LanguageTag

IsString LanguageTag

The IsString instance is not total since it will fail given a syntactically-invalid language tag.

toLangTag :: Text -> Maybe LanguageTag

Create a LanguageTag element from the label.

Valid tags follow the ABNF from RCF 3066, which is

   Language-Tag = Primary-subtag *( "-" Subtag )
   Primary-subtag = 1*8ALPHA
   Subtag = 1*8(ALPHA / DIGIT)

There are no checks that the primary or secondary sub tag values are defined in any standard, such as ISO 639, or obey any other syntactical restriction than given above.

fromLangTag :: LanguageTag -> Text

Convert a language tag back into text form.

isBaseLang

Arguments

:: LanguageTag

base language

-> LanguageTag

comparison language

-> Bool

Compare language tags using the Language-range specification in section 2.5 of RFC 3066.

True is returned if the comparison tag is the same as, or matches a prefix of, the base tag (where the match must be over complete sub tags).

Note that

 l1 `isBaseLang` l2 == l2 `isBaseLang` l1

only when

 l1 == l2

Miscellaneous routines

swishName :: LName -> ScopedName

Convert a local name to a scoped name in the swish namespace (namespaceSwish).

rdfdGeneralRestriction :: ScopedName

rdfd:GeneralRestriction.

rdfdOnProperties :: ScopedName

rdfd:onProperties.

rdfdConstraint :: ScopedName

rdfd:constraint.

rdfdMaxCardinality :: ScopedName

rdfd:maxCardinality.

logImplies :: ScopedName

log:implies.

defaultBase :: ScopedName

default:base.

Re-exported modules

module Swish.RDF.Vocabulary.RDF

module Swish.RDF.Vocabulary.OWL

module Swish.RDF.Vocabulary.XSD