import type * as RDF from '@rdfjs/types';
/**
 * A term dictionary is able to encode RDF terms into values of type E,
 * and decode values of type E into RDF terms.
 */
export interface ITermDictionary<E> {
    /**
     * A record indicating supported features of this index.
     */
    features: {
        /**
         * If true, this dictionary implements the `findQuotedTriples` method.
         */
        quotedTriples?: boolean;
    };
    /**
     * Encode the given RDF term.
     * Multiple invocations of this method with the same term MUST return the same value.
     * @param term An RDF term.
     */
    encode: (term: RDF.Term) => E;
    /**
     * Return the encoding of the given RDF term, but do not create a new encoding if it doesn't exist,
     * but return undefined.
     * @param term An RDF term.
     */
    encodeOptional: (term: RDF.Term) => E | undefined;
    /**
     * Decode the given encoded value into an RDF term.
     * Multiple invocations of this method with the same term MUST return the same value.
     * @param encoding An encoded RDF term.
     */
    decode: (encoding: E) => RDF.Term;
    /**
     * Return all encoded terms.
     */
    encodings: () => IterableIterator<E>;
    /**
     * Find all quoted triples in this dictionary that match with the given triple pattern.
     * @param quotedTriplePattern A triple pattern to match with quoted triples.
     */
    findQuotedTriples: (quotedTriplePattern: RDF.Quad) => IterableIterator<RDF.Term>;
    /**
     * Find all encoded quoted triples in this dictionary that match with the given triple pattern.
     * @param quotedTriplePattern A triple pattern to match with quoted triples.
     */
    findQuotedTriplesEncoded: (quotedTriplePattern: RDF.Quad) => IterableIterator<E>;
}