Research On The Semantic Recognition And Functional Expression Of Urban Planning Decision Data Rule

Urban planning decision data rule is which can checkout the urban planning decision data.The source of urban planning decision data rule mainly is urban planning standard, drawing data standard and so on. It is expressed by natural language and is difficult to be identified by computer.It is right here that the challenge of urban planning decision data rule application lies: how to effectively construct the urban planning decision data rule that computers can recognize.Because of a large amount of urban planning standard, it is difficult to list all of the standard integrality by methods of investigation, analysis, epagoge and summarization.So, this paper researches on the recognition of the semantic of urban planning dicision data rule automatically, and express the urban planning decision data according to the semantic.The Urban planning decision data rule is also complex. An item of rule may not only contain spatial rule, but also include attribute rule. According to it, this paper introduces the function way into the expression of Urban planning decision data. Functional expression has the characters of logical, dynamic and repeated useful. An item of complex rule can be combined with some statures rule function.This paper, firstly, analyses the semantic of Urban planning decision data rule,whitch can be used in semantic database.The semantic of Urban planning decision data rule includes the semantic of Urban planning decision data, the semantic of the spatial and attributed relations of planning Entity which controlled by rule and the semantic of spatial analysis.Secondly, this paper establishes the semantic dictionary database of the urban planning decision data rule in the base of analysis of the semantic of Urban planning decision data rule. Identifying and carrying out the semantic of the urban planning decision data which expressed by natural language in use of identifying methods of natural semantic which has been researched by predecessor. Describing the rule formally in the according of the semantic. Expressing the rule with several movable units of rule (movable unit of rule includes function name, importation object and output result). Thirdly, withdrawing the main factor of function of the rule movable units by analysis the movable unit of rule, setting up their function database. Finally, express the rule with function by calling the functions from the movable units of rules.