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Descriptive query language for semantic data model

A semantic data model and query language technology, applied in the field of query language, can solve the problem of query, query is not concise and unnatural, and achieve the effect of simple and compact style, better structure, direct and natural modeling language

Inactive Publication Date: 2011-01-19
无锡市浏立方科技有限公司
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects and problems in the prior art that are not applicable to the query of the INM class semantic data model, and the query is not concise and unnatural, and provide a descriptive query that is concise and natural and suitable for the INM class semantic data model query language

Method used

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specific Embodiment

[0172](1) The query statement consists of two parts: query expression and construction item, as follows:

[0173] query E 1 ,...,E n construct C

[0174] where E 1 ,...,E n (n≥1) is a query expression, and C is an optional construction item. When C is not present, the keyword construct must also be omitted.

[0175] It shows that a query is divided into two parts: the query part uses the variable and binds it to the object of the INM semantic data model and any part thereof according to the location of the variable to get the information you want to find; the construction part uses the variable binding The specified value defines the format of the result. Omitting C indicates that the query does not define the format of the result, but only determines whether the query part is true (true) or false (false), and outputs the value.

[0176] The present invention restricts the semantic legitimacy of the query statement through the type of the variable, specifically:

[017...

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Abstract

The invention discloses a descriptive query language for a semantic data model. Aiming at the characteristics that objects in an INM semantic data model can naturally express a complex relationship between entities in a real world and text information, the entities in the real world are intensively expressed in a mode of corresponding to the real world one to one by using an object structure comprising a relationship level structure and a combined level structure and the objects are interconnected to form a graph structure, the invention provides the descriptive query language. The query language comprises a query part and a result structure part which are totally separated, wherein the query part comprises at least one query expression, and the result structure part comprises a structure item. Moreover, the descriptive query language directly expresses query according to the elements of the model, and covers useful characteristics of logic variable, internal present and absent quantifier, explicit generality quantifier and the like in a database and a logic program design. The descriptive query language meets the requirements of simplicity, practicability and strong expression capability.

Description

technical field [0001] The present invention relates to a query language, in particular to a descriptive query language for semantic data models, which is particularly suitable for the one-to-one correspondence between objects and entities in the real world and the very direct and natural representation of the relationship between organizations and individuals A query language for semantic data models of complex relational and contextual information. Background technique [0002] In the real world, there are various complex and dynamic connections between entities and entities, entities and relationships, and relationships and relationships. In particular, organizations and individuals are interconnected through various dependencies to form a graph-like structure. The semantic data model targeted by the present invention can express these characteristics very directly and naturally. [0003] The semantic data model aimed at by the present invention refers to: it can natural...

Claims

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Application Information

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IPC IPC(8): G06F17/30
Inventor 刘梦赤胡婕
Owner 无锡市浏立方科技有限公司
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