about URLbasecolumncolumn referencecomment prefixdatatypedecimal characterdefaultdelimiterdescribesdialectdouble quoteencodingforeign keyformatgroup characterheaderheader row countlanguagelengthline terminatorsmax exclusivemax inclusivemax lengthmin exclusivemin inclusivemin lengthnamenotenullorderedpatternprimary keyproperty URLquote charreferencereferenced rowsrequiredresourcerow