Table of Contents

Phrase and proximity

PhraseQuery

Matches documents containing the given terms in order.

var exact = new PhraseQuery("title", "quick", "brown", "fox");

Slop allows extra positions between terms. Slop 2 matches "quick X Y brown fox" in any order within the window.

var loose = new PhraseQuery("title", slop: 2, "quick", "fox");

Default slop is 0 (exact).

SpanNearQuery

For nested proximity, use span queries. SpanTermQuery wraps a term; SpanNearQuery groups them with a slop and an InOrder flag.

var near = new SpanNearQuery(
    clauses: new[]
    {
        new SpanTermQuery("body", "machine"),
        new SpanTermQuery("body", "learning")
    },
    slop: 3,
    inOrder: true);

Span queries can be combined with SpanOrQuery and SpanNotQuery for richer positional logic.

See also

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