MarkLogic 9 Product Documentationsem functions
The table below lists all the
sem built-in
functions (in this namespace:
http://marklogic.com/semantics).
56 functions
| Function name | Description |
|---|---|
| sem:binding | Creates a sem:binding object, which is a sub-type of json:object (and map:map). |
| sem:bnode | This function returns an identifier for a blank node, allowing the construction of a triple that refers to a blank node. |
| sem:coalesce | Returns the value of the first argument that evaluates without error. |
| sem:curie-expand | This function expands a CURIE (Compact URI) into a sem:iri object. |
| sem:curie-shorten | This function shortens an IRI into a CURIE (Compact URI) into a sem:iri object. |
| sem:database-nodes | This function returns database nodes backing given triples. |
| sem:datatype | Returns the name of the simple type of the atomic value argument as a SPARQL style IRI. |
| sem:default-graph-iri | Returns the iri of the default graph. |
| sem:describe | This function implements the Concise Bounded Description (CBD) specification to describe one or more nodes in the graph. |
| sem:graph | This function returns all triples from a named graph in the database. |
| sem:graph-add-permissions | Add permissions to the graph specified. |
| sem:graph-delete | This function deletes a named graph, and its graph document containing metadata, from the database. |
| sem:graph-get-permissions | Get permissions to the graph specified. |
| sem:graph-insert | This function inserts triples into a named graph, creating the graph if necessary. |
| sem:graph-remove-permissions | Remove permissions from the graph specified. |
| sem:graph-set-permissions | Set permissions to the graph specified. |
| sem:if | The IF function form evaluates the first argument, interprets it as a effective boolean value, then returns the value of expression2 if the EBV is true, otherwise it returns the value of expression3. |
| sem:in-memory-store | Returns a sem:store constructor that queries from the sequence of sem:triple values passed in as an argument. |
| sem:invalid | Returns a sem:invalid value with the given literal value and datatype IRI. |
| sem:invalid-datatype | Returns the datatype IRI of a sem:invalid value. |
| sem:iri | This is a constructor function that takes a string and constructs an item of type sem:iri from it. |
| sem:isBlank | Returns true if the argument is an RDF blank node - that is, derived from type sem:blank. |
| sem:isIRI | Returns true if the argument is an RDF IRI - that is, derived from type sem:iri, but not derived from type sem:blank. |
| sem:isLiteral | Returns true if the argument is an RDF literal - that is, derived from type xs:anyAtomicType, but not derived from type sem:iri. |
| sem:isNumeric | Returns true if the argument is a valid numeric RDF literal. |
| sem:lang | Returns the language of the value passed in, or the empty string if the value has no language. |
| sem:langMatches | Returns true if $lang-tag matches $lang-range according to the basic filtering scheme defined in RFC4647. |
| sem:prefixes | This function returns a set of prefix mappings for use with CURIE processing. |
| sem:query-results-serialize | This function implements the W3C SPARQL Query Results format. |
| sem:random | Returns a random double between 0 and 1. |
| sem:rdf-builder | This function returns a function that builds triples from CURIE and blank node syntax. |
| sem:rdf-get | This function returns sem:triples from a specified location. |
| sem:rdf-insert | This function inserts triples into a specified database as one or more sem:triples documents. |
| sem:rdf-load | This function inserts an RDF document from a specified location into the designated database. |
| sem:rdf-parse | This function returns parsed sem:triple objects from a text format or XML. |
| sem:rdf-serialize | This function returns a string or json or XML serialization of the provided triples. |
| sem:resolve-iri | Resolves a relative URI against an absolute URI. |
| sem:ruleset-store | The sem:ruleset-store function returns a set of triples derived by applying the ruleset to the triples in the sem:store constructor provided in $store ("the triples that can be inferred from these rules"). |
| sem:sameTerm | Returns true if the arguments are the same RDF term as defined by the RDF concepts specification. |
| sem:sparql | Executes a SPARQL query against the database. |
| sem:sparql-plan | Return a node representing the query plan of the given SPARQL query. |
| sem:sparql-update | Executes a SPARQL Update operation against the database. |
| sem:sparql-values | This function executes a SPARQL SELECT query using passed-in bindings participating as a starting point for the query. |
| sem:store | The sem:store function defines a set of criteria, that when evaluated, selects a set of triples to be passed in to sem:sparql(), sem:sparql-update(), or sem:sparql-values() as part of the options argument. |
| sem:timezone-string | Returns the timezone of an xs:dateTime value as a string. |
| sem:transitive-closure | From a starting set of seeds, follow a given set of predicates, to a given depth, and return all unique node IRIs. |
| sem:triple | Creates a triple object, which represents an RDF triple containing atomic values representing the subject, predicate, object, and optionally graph identifier (graph IRI). |
| sem:triple-graph | Returns the graph identifier (graph IRI) from a sem:triple value. |
| sem:triple-object | Returns the object from a sem:triple value. |
| sem:triple-predicate | Returns the predicate from a sem:triple value. |
| sem:triple-subject | Returns the subject from a sem:triple value. |
| sem:typed-literal | Returns a value to represent the RDF typed literal with lexical value $value and datatype IRI $datatype. |
| sem:unknown | Returns a sem:unknown value with the given literal value and datatype IRI. |
| sem:unknown-datatype | Returns the datatype IRI of a sem:unknown value. |
| sem:uuid | Return a UUID URN (RFC4122) as a sem:iri value. |
| sem:uuid-string | Return a string that is the scheme specific part of random UUID URN (RFC4122). |