FieldOptionsByUseCase

Here is a summary of available options on a field, broken down by use case. A true or false indicates that the option must be set to the given value for the use case to function correctly.

use case	indexed	stored	multiValued	omitNorms	termVectors	termPositions
search within field	`true`
retrieve contents		`true`
use as unique key	`true`		`false`
sort on field	`true`		`false`	`true` [1]
use field boosts				`false`
document boosts affect searches within field				`false`
highlighting	`true`[4]	`true`			[2]	`true` [3]
faceting	`true`
add multiple values, maintaining order			`true`
field length affects doc score				`false`
`MoreLikeThis`					`true`

Notes:

recommended but not necessary
will be used if present, but not necessary
(if termVectors=true)
a tokenizer must be defined for the field, but it doesn't need to be indexed

For further considerations for faceting, see also SolrFacetingOverview.