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首页> 外文会议>International Conference on Conceptual Modeling; 20061106-09; Tucson,AZ(US) >Explicitly Representing Superimposed Information in a Conceptual Model
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Explicitly Representing Superimposed Information in a Conceptual Model

机译：在概念模型中明确表示叠加信息

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摘要

Superimposed information (SI) refers to new information such as annotations and summaries overlaid on fragments of existing base information (BI) such as web pages and PDF documents. Each BI fragment is referenced using an encapsulated address called a mark. Based on the widespread applicability of SI and wide range of superimposed applications (SAs) that can be built, we consider here how to represent marks explicitly in a conceptual model for an SA. The goal of this work is to facilitate the development of SAs by making it easy to model SI (including the marks) and to exploit the middleware and query capability that we have developed for managing marks and interacting with the base applications. The contribution of this paper is a general-purpose framework to make marks explicit in a conceptual (ER) model. We present conventions to associate marks with entities, attributes, and relationships; and to represent that an attribute's value is the same as the excerpt obtained from a mark. We also provide procedures to automatically convert ER schemas expressed using our conventions to relational schemas, and show how a resulting relational schema supports SQL queries over the combination of SI, the associated marks and the excerpts associated with the marks.
机译：叠加信息（SI）指的是新信息，例如注释和摘要，它们覆盖在现有基本信息（BI）（例如网页和PDF文档）的片段上。使用称为标记的封装地址来引用每个BI片段。基于SI的广泛适用性和可以构建的大量重叠应用程序（SA），我们在这里考虑如何在SA的概念模型中明确表示标记。这项工作的目的是通过简化对SI（包括标记）的建模来促进SA的开发，并利用我们开发的用于管理标记和与基础应用程序交互的中间件和查询功能。本文的贡献是在概念（ER）模型中使标记明确的通用框架。我们提出了将标记与实体，属性和关系相关联的约定；并表示属性值与从标记中摘录的值相同。我们还提供了将使用约定表达的ER模式自动转换为关系模式的过程，并显示了生成的关系模式如何支持SI，关联标记和与标记关联的摘录的组合上的SQL查询。

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