Apache Solr Reference Guide Covering Apache Solr 6.0

You must also turn on termVectors, termPositions, and termOffsets for each field that will be
highlighted. Lastly, you should use a boundary scanner to prevent the FastVectorHighlighter from truncating your
terms. In most cases, using the breakIterator boundary scanner will give you excellent results. See the
section Using Boundary Scanners with the Fast Vector Highlighter for more details about boundary scanners.
FastVector Highlighter Parameters
The table below describes Solr's parameters for this highlighter, many of which overlap with the standard
highlighter. These parameters can be defined in the highlight search component, as defaults for the specific
request handler, or passed to the request handler with the query.
Parameter Default Description
hl blank (no highlighting) When set to true, enables highlighted snippets to be
generated in the query response. A false or blank
value disables highlighting.
hl.useFastVectorHighlighter false When set to true, enables the FastVector
Highlighter.
hl.q blank Specifies an overriding query term for highlighting. If
hl.q is specified, the highlighter will use that term
rather than the main query term.
hl.fl blank Specifies a list of fields to highlight. Accepts a
comma- or space-delimited list of fields for which
Solr should generate highlighted snippets. If left
blank, highlights the defaultSearchField (or the field
specified the df parameter if used) for the
StandardRequestHandler. For the
DisMaxRequestHandler, the qf fields are used as
defaults.
A '*' can be used to match field globs, such as
'text_*' or even '*' to highlight on all fields where
highlighting is possible. When using '*', consider
adding hl.requireFieldMatch=true.
hl.snippets 1 Specifies maximum number of highlighted snippets
to generate per field. It is possible for any number of
snippets from zero to this value to be generated.
This parameter accepts per-field overrides.
hl.fragsize 100 Specifies the size, in characters, of fragments to
consider for highlighting. 0 indicates that no
fragmenting should be considered and the whole
field value should be used. This parameter accepts
per-field overrides.
hl.requireFieldMatch false If set to true, highlights terms only if they appear in
the specified field. If false, terms are highlighted in
all requested fields regardless of which field
matched the query.
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