2001-12-17T09:30:47.0Z SYS001 2001-12-17T09:30:47.0Z SYS002 PT5M0S OPK Example - exchange of just the delays for a previously exchanged site. naptPoi http://www.naptan.org.uk/pois UK NaPTAN POIs oda http://www.oda.org.uk/data/ data from Olympica Developmnet Authority EXTERNAL PT10M PT40M PT80M EXTERNAL PT8M PT15M PT30M EXTERNAL PT3M PT3M PT6M EXTERNAL PT25M PT25M PT50M EXTERNAL PT6M PT15M PT30M EXTERNAL PT3M PT3M PT6M EXTERNAL PT10M PT20M PT40M EXTERNAL PT4M PT10M PT20M EXTERNAL PT3M PT3M PT6M EXTERNAL PT8M PT15M PT30M EXTERNAL PT10M PT20M PT30M EXTERNAL PT3M PT3M PT6M EXTERNAL PT6M PT15M PT30M EXTERNAL PT8M PT15M PT25M EXTERNAL PT3M PT3M PT6M EXTERNAL PT4M PT10M PT20M EXTERNAL PT6M PT12M PT20M EXTERNAL PT3M PT3M PT6M