new RDFGraph(storeopt)
Create an RDF graph wrapper
Parameters:
| Name |
Type |
Attributes |
Description |
store |
object
|
<optional>
|
An rdflib graph store |
- Source:
Throws:
-
When store does not implement the required graph methods
-
-
Type
-
Error
Methods
addStatement(statement) → {RDFGraph}
Add a statement to the graph.
Parameters:
- Source:
Returns:
This graph
-
Type
-
RDFGraph
addStatementIfMissing(statement) → {RDFGraph}
Add a statement only when the exact statement is missing.
Parameters:
- Source:
Returns:
This graph
-
Type
-
RDFGraph
createIndex() → {Object}
Build generic term indexes from statement subjects and objects.
- Source:
Returns:
Generic graph indexes.
-
Type
-
Object
dedupeStatements() → {RDFGraph}
Remove duplicate RDF statements from the graph.
- Source:
Returns:
This graph
-
Type
-
RDFGraph
findStatements(patternopt) → {Array.<RDFGraphStatement>}
Find statements matching the provided pattern.
Parameters:
| Name |
Type |
Attributes |
Description |
pattern |
PartialRDFGraphStatement
|
<optional>
|
Subject, predicate, and/or
object values to match. |
- Source:
Returns:
Matching rdflib statements.
-
Type
-
Array.<RDFGraphStatement>
getStatements(optionsopt) → {Array.<RDFGraphStatement>}
Get all statements.
Parameters:
| Name |
Type |
Attributes |
Description |
options |
object
|
<optional>
|
Read options.
Properties
| Name |
Type |
Attributes |
Description |
copy |
boolean
|
<optional>
|
Return a shallow copy. |
|
- Source:
Returns:
The graph statements.
-
Type
-
Array.<RDFGraphStatement>
hasStatement(patternopt) → {boolean}
Check whether a matching statement exists.
Parameters:
| Name |
Type |
Attributes |
Description |
pattern |
PartialRDFGraphStatement
|
<optional>
|
Subject, predicate, and/or
object values to match. |
- Source:
Returns:
True if at least one statement matches.
-
Type
-
boolean
parseXml(xml, baseUri) → {RDFGraph}
Parse RDF/XML into this graph.
Parameters:
| Name |
Type |
Description |
xml |
string
|
RDF/XML string |
baseUri |
string
|
Parser base URI |
- Source:
Returns:
This graph
-
Type
-
RDFGraph
removeNodeReferences(node) → {RDFGraph}
Remove every statement where the node is subject or object.
Parameters:
| Name |
Type |
Description |
node |
object
|
The node to remove. |
- Source:
Returns:
This graph
-
Type
-
RDFGraph
removeStatement(statement) → {RDFGraph}
Remove a statement from the graph.
Parameters:
- Source:
Returns:
This graph
-
Type
-
RDFGraph
removeStatementsMatching(patternopt) → {RDFGraph}
Remove all statements matching the provided pattern.
Parameters:
| Name |
Type |
Attributes |
Description |
pattern |
PartialRDFGraphStatement
|
<optional>
|
Subject, predicate, and/or
object values to match. |
- Source:
Returns:
This graph
-
Type
-
RDFGraph
replaceNodeValue(oldValue, newValue) → {RDFGraph}
Replace all references to one URI node with another URI node.
Parameters:
| Name |
Type |
Description |
oldValue |
string
|
The URI to replace. |
newValue |
string
|
The replacement URI. |
- Source:
Returns:
This graph
-
Type
-
RDFGraph
replaceNodeValues(replacements, optionsopt) → {RDFGraph}
Replace URI subjects and objects, including collection entries, from a
replacement map. Predicate URIs stay unchanged.
Parameters:
| Name |
Type |
Attributes |
Description |
replacements |
Map.<string, string>
|
|
Old URI to new URI |
options |
object
|
<optional>
|
Replacement options
Properties
| Name |
Type |
Attributes |
Description |
preserveObjectPredicates |
Array.<string>
|
<optional>
|
Predicate URIs whose
objects stay unchanged, e.g. prov:atLocation. Subjects are still replaced |
|
- Source:
Returns:
This graph
-
Type
-
RDFGraph
restoreStatements(snapshot) → {RDFGraph}
Replace current statements with a previous statement snapshot.
Parameters:
- Source:
Returns:
This graph
-
Type
-
RDFGraph
serializeStatementsToXml(statements) → {string}
Serialize statements to RDF/XML.
Parameters:
- Source:
Returns:
RDF/XML
-
Type
-
string
buildKey(parts) → {string}
Build a stable serialized key from ordered values converted to strings.
Parameters:
| Name |
Type |
Description |
parts |
Array.<*>
|
Ordered key parts |
- Source:
Returns:
Stable serialized key
-
Type
-
string
buildStatementKey(statement) → {string}
Build a stable identity key for one RDF statement or statement pattern.
Parameters:
| Name |
Type |
Description |
statement |
Object
|
RDF statement |
- Source:
Returns:
Stable statement key
-
Type
-
string
buildTermKey(term) → {string}
Build a stable identity key for one RDF term, including literal type.
Parameters:
| Name |
Type |
Description |
term |
NamedNode
|
BlankNode
|
Literal
|
null
|
undefined
|
RDF term |
- Source:
Returns:
Stable term key
-
Type
-
string
createBlankNode(idopt) → {object}
Create an RDF blank node. Blank nodes are unnamed resources whose
identity only matters inside this graph, often used for nested structures
that do not have their own URI or PID.
Parameters:
| Name |
Type |
Attributes |
Description |
id |
string
|
<optional>
|
Optional local blank node identifier |
- Source:
Returns:
RDF blank node
-
Type
-
object
createLiteral(value, languageOrDatatypeopt, datatypeopt) → {object}
Create an RDF literal. Literals are concrete values, such as strings,
dates, or numbers, stored as data instead of as links to another
resource.
Parameters:
| Name |
Type |
Attributes |
Description |
value |
*
|
|
Literal value |
languageOrDatatype |
string
|
object
|
<optional>
|
Language tag or datatype node
that describes the literal value, such as `en` or `xsd:string`. |
datatype |
object
|
<optional>
|
Datatype node |
- Source:
Returns:
RDF literal
-
Type
-
object
createNamedNode(uri) → {object}
Create a named RDF node from a URI. Named nodes are resources with stable
identifiers, so two statements using the same URI refer to the same RDF
resource.
Parameters:
| Name |
Type |
Description |
uri |
string
|
Node URI |
- Source:
Returns:
RDF named node
-
Type
-
object
createNamespace(uri) → {function}
Create a namespace helper for building named RDF terms.
Parameters:
| Name |
Type |
Description |
uri |
string
|
Namespace URI |
- Source:
Returns:
Namespace function
-
Type
-
function
createStatement(subject, predicate, object, whyopt) → {RDFGraphStatement}
Create an RDF statement.
Parameters:
| Name |
Type |
Attributes |
Description |
subject |
object
|
|
Named node or blank node the statement is about |
predicate |
object
|
|
Named node that identifies the relationship |
object |
object
|
|
Named node, blank node, or literal value |
why |
object
|
<optional>
|
Optional graph/context |
- Source:
Returns:
RDF statement
-
Type
-
RDFGraphStatement
dedupeTerms(terms) → {Array.<(NamedNode|BlankNode|Literal)>}
Deduplicate RDF terms by exact RDF term identity.
Parameters:
| Name |
Type |
Description |
terms |
Array.<(NamedNode|BlankNode|Literal)>
|
Candidate RDF terms |
- Source:
Returns:
Deduplicated terms
-
Type
-
Array.<(NamedNode|BlankNode|Literal)>
getLiteralValue(term) → {*|null}
Read the value stored in a literal term. Return null for named nodes and
blank nodes because they identify resources rather than store values.
Parameters:
| Name |
Type |
Description |
term |
NamedNode
|
BlankNode
|
Literal
|
null
|
undefined
|
RDF term |
- Source:
Returns:
Literal value, or null for terms that are not literals.
-
Type
-
*
|
null
isBlankNode(term) → {boolean}
Check whether a term is a blank node.
Parameters:
| Name |
Type |
Description |
term |
NamedNode
|
BlankNode
|
Literal
|
null
|
undefined
|
RDF term |
- Source:
Returns:
True if the term is a blank node
-
Type
-
boolean
isLiteral(term) → {boolean}
Check whether a term is a literal node.
Parameters:
| Name |
Type |
Description |
term |
NamedNode
|
BlankNode
|
Literal
|
null
|
undefined
|
RDF term |
- Source:
Returns:
True if the term is a literal node
-
Type
-
boolean
isNamedNode(term) → {boolean}
Check whether a term is a named node.
Parameters:
| Name |
Type |
Description |
term |
NamedNode
|
BlankNode
|
Literal
|
null
|
undefined
|
RDF term |
- Source:
Returns:
True if the term is a named node
-
Type
-
boolean
isTermOfType(term, type) → {boolean}
Check whether a term is of a specific RDF term type.
Parameters:
| Name |
Type |
Description |
term |
NamedNode
|
BlankNode
|
Literal
|
null
|
undefined
|
RDF term |
type |
string
|
RDF term type |
- Source:
Returns:
True if the term is of the specified type
-
Type
-
boolean