For example, a Lonclass or UDC code may represent "Report on the environmental impact of the decline of
tin mining in Sweden in the 20th century". This would be represented as a sequence of numbers and punctuation. The complex code can be broken down into primitives such as "Sweden" or "tin mining" (which itself could be broken down to "Tin" and "Mining"). Some specific BBC Lonclass examples (with explanatory labels): • R672:32.007(47)YELTSIN:342.518.1THATCHER "TWO SHOTS OF MARGARET THATCHER AND BORIS YELTSIN" • [BRITISH AEROSPACE].007.11PEARCE: 656.881:342.518.1THATCHER "LETTER TO MRS THATCHER FROM SIR AUSTIN PEARCE" • 656.881:301.162.721:32.007THATCHER: 654.192.731TV-AM "MARGARET THATCHER'S LETTER OF APOLOGY TO TV AM" • 656.881:301.162.721 "LETTERS OF APOLOGY" • 656.881 "LETTERS (POSTAL SERVICES)" • 656.881:06.022.6 "RESIGNATION LETTERS" • 654.192.731TV-AM "TV AM (TELEVISION AM)" ==Notes==