Delegate handling search values that are to be applied to multiple
attributes, e.g. id, email and date. Components need to implement the
ERMD2WAttributeQueryDelegate.ERMD2WQueryComponent interface. One or more attributes to qualify on
may be defined via the searchKey D2W key. If searchKey is null,
keyWhenRelationship will be evaluated.
If you wish to search for dates, you likely want to specify custom patterns
via
er.modern.directtoweb.delegates.ERMD2WAttributeQueryDelegate.datePatterns.
The default patterns are for use with ERXTimestampFormatter's default of
month, day, year, separated by '/'.
If "ddMM" or "MMdd" are defined, a four digit query string will be
interpreted as a day/month combination. If these patterns are not defined,
but "yyyy" is, then a four digit query string will be interpreted as a year.
For usage examples, see @ERMD2WListFilter and @ERMD2WEditToOneTypeAhead.