OptionalmaxMax features to return (sent as the WFS 2.0 count parameter).
OptionalsortProperty to sort by; append " D" (a space) for descending, e.g. "end_measure D";
several keys are comma-separated ("end_measure D,kenn"). Defaults to
DEFAULT_SORT_BY[kind] (kenn, or kenn,end_measure for a time series), since
the service can only page a sorted result. A blank value ("" or whitespace), an
empty key or a direction other than A/ASC/D/DESC (any case) is rejected
with StrahlValidationError before any request — the WFS reads an unknown
direction as ascending. Sent normalised (normalizeSortBy): keys trimmed, inner
whitespace collapsed, the direction as A or D.
OptionalstartOffset for paging (WFS 2.0 startIndex); without maxFeatures, everything from it on.
OptionalstationRestrict to a station by its kenn id (becomes CQL_FILTER=kenn='<id>').
Common options for a feature query.