© Department of Communities and Local Government. © Crown copyright, 2007. The Home Condition Report logo and associated wording is a registered trade mark - any unlicensed use is not permitted. Copyright in the typographical arrangement of this document rests with the Crown. This publication, excluding logos, may be reproduced free of charge in any format or medium for research, private study, for internal circulation within an organisation or by registered scheme users. This is subject to it being reproduced accurately and not used in a misleading context. A discrete identifiable possession, such as a piece of real-estate, to which its owner has legal title. For the Home Information Pack legislation the types of property are restricted to residential properties. It should be observed that "a property is a property is a property" and all real-estate properties, whether residential or commercial or whether being sold for the first or the nth time will have a very similar conceptual structure and similar rules and constraints. As such the broad description of a Property can be regarded as a framework, containing a set of extension points, that can be expanded as necessary to cover additional detail. Unique Property Reference Number An address is composed of a number of structured elements such as Postcode, Post-Town, Street etc. The District part of the Address. A District is an optional sub-part of the Post Town e.g. "Kings Heath" in "Birmingham" or "Ellington" in London. The Postcode for the Address Unique Property Reference Number - a 10-digit numeric string unmiquely identifuying each Property that may have a HCR registered against it. This is the primary key definition for the Property class - used when a message requires a reference to a Property to be passed rather than the details.