OptionalDefaultOptionalOrderDefault sort order applied to every query. Translated to CAML <OrderBy>.
Applied before MaxItems truncation — ensures the most relevant items are returned first.
When omitted, SP returns items in its natural order (typically by ID ascending).
OptionalAscending?: booleanSort direction. Defaults to descending (false).
Internal field name to sort by.
Array of list relative urls of the lists to be searched.
Optional static CAML Where element appended to every search query.