Help:Notes on record types
Record related datatypes rely on special treatment in SMW as the DataItem is stored as separate entity while display characteristics are that of a "flat" DataValue where in fact it is represented as
A new record type should be registered with the name to include `_rec` 1 so existing container related handling (as in case of
ResultArray) can be make use of it.
Register a newly created record type as subtype 3.
$dataTypeRegistry->registerDatatype( '_sci_freq_rec', '\SCI\DataValues\CitationFrequencyValue', DataItem::TYPE_WIKIPAGE, false, true // subtype );