Studies on Development of Advanced Multi-Media Databases Based on Semantic Structures

1988年，我们开始研究多媒体数据库的基本操作，并设计一种多媒体数据库查询语言来处理多媒体数据。1989年，我们研究了屏幕上显示对象的干扰所引起的问题，并提出了语义概述函数来解决这些问题。1990年，我们设计了一种新型的可视化层次查询语言，它为用户提供了一个操作复杂结构化多媒体数据和构造语义视图层次的环境。我们还研究了多媒体数据库元素链接结构的检索和更新操作，设计了可视化层次查询语言，使用户能够构造与多媒体数据输出高级形式相对应的复杂查询。可视化层次查询语言为用户提供了增量构造查询、修改部分查询以及全局更改查询范围的功能。在可视化层次查询语言环境下，语义结构的重点可以从数据库侧转移到用户视图侧。此外，数据库和用户的视图被可视化为图标，我们可以通过直接操作图标来创建查询和新视图。该环境目前正在Macintos计算机上实现。

In 1988, we began our study on fundamental operations for multi-media databases and the design of a multi-media database query language to manipulate multi-media data. In 1989, we investigated problems which arise from the interference of display objects on a screen, and proposed Semantic Overview Functions to solve these problems. In 1990, we designed a new style visual hierarchical query language which provides users with an environment to operate complex structured multi-media data and construct their semantic view hierarchies easily and freely. We also studied the retrieval and update operations to link structures which are elements of multi-media databases.The visual hierarchical query language is designed to allow users to construct complex queries which correspond to advanced forms of outputs of multi-media data. The visual hierarchical query language provides users with facilities to construct queries incrementally, modify parts of them, and change the scope of them globally. In the environment of the visual hierarchical query language, the stress of semantic structures can be moved from the side of databases to the side of users' views. In addition, databases and users' views are visualized into icons, and we can create queries and new views by directly manipulating the icons. The environment is currently being implemented on Macintos computers.