查询词典 schema

If we come back to our highly simplified example with only "library" and "book" elements, we have achieved a pretty good equivalence with the closed schemas previously developed with XSLT and Schematron and you may wonder if we can open our schema to allow arbitrary text and element nodes within our book element like we had been able to do.

如果我们回到我们高度简化的只有"library"和"book"元素的例子中来，我们已经实现了和前面用 XSLT 以及 Schematron 开发的封闭 schema 几乎完全相同的对等物。而且你可能想要知道是否我们能开放我们的 schema 让任意的文本和元素节点都能出现在我们的 book 元素中像我们前面能够做到的那样。

The XML schema mana gement is another important pi ece in the database abstractio n concept that MDB provides.

XML schema 管理是 MDB 提供的数据库抽象概念的另外一个非常重要的部分。

First design a reasonable XML Schema structure and under the restriction of XML Schema use XML to describe the UML class diagram and the related specification, and then extract the test specification of method from XML test script. Test specification refers to predicate sequences in the form of conjunctive normal form, extracted from basic constraint conditions of variables included in test scripts and expected outputs. Each conjunctive normal form can be transformed to an inequation set, and adopt 1×1 domain test strategy to every inequation set to produce the domain test matrix, which in turn produce the test case.

首先设计合理的XML Schema结构，并在该XML Schema的有效性约束下，用XML对UML类图及相关性约束进行脚本描述；其次对XML测试脚本进行分析，提取方法的测试规约说明，所谓测试规约说明就是从测试脚本中包含的变量的基本约束条件以及期望输出中抽取得到的以合取范式形式存在的谓词序列；每一合取范式对应一个不等式组，对每一个不等式组采用1×1域测试策略，生成域测试矩阵，最终得到测试用例。

DDL locks DDL locks protect the structure of schema objects—for example, the definitions of tables and views.

DDL locks 保护的是一个schema下面的对象的结构。比如表或者视图的定义。

Another important difference is that RDF Schema descriptions are not necessarily prescriptive in the way programming language type declarations typically are.

另外一个重要的区别是：RDF Schema的描述不一定像程序语言类型声明那样是规约性的。

The following table shows the difference between loading without validation, with DTD validation, and with XML Schema validation.

下表中显示了载入时没有验证，有 DTD 验证和有 XML Schema 验证的不同情况

Fully taken consideration of the features of the XML Schema, the structures of the logical UML class diagram are concise. Through a series of steps, the logical UML class diagram can be translated from the original conceptual UML class diagram, thereafter the XML Schema can be available in a one to one manner.

给出的逻辑层UML类图充分利用了XML Schema文档的嵌套结构特点，结构清晰简明，经过一系列的转换步骤，可以由概念层的UML类图生成逻辑层UML类图，并最终得到XML Schema设计。

To this kind of requirement, I think of two kinds of means of settlements: 1, when XML Schema is being designed, with respect to the requirement that changes considering business, had taken relevant patulous property beforehand, allow dynamic change. 2, when API is coming true, can solve the problem of test and verify of the new old XML that the change of XML Schema brings about, and can correct Marshaller and Unmarshaller.

对于这种要求，我想到两种解决方法：1、XML Schema在设计时，就考虑到业务变化的要求，预先留好相关的扩展属性，允许动态变化。2、API在实现时，能够解决XML Schema的变化导致的新老XML的验证问题，并能够正确的marshaller和unmarshaller。

To the 2nd kind of method, the XML Schema with good predefine can produce change as the development of business, when that is undertaking relevant design, must consider this a little bit, had better be the assemble to change, inquiry, show the change that waits for API to be able to get used to XML Schema.

对于第二种方法，预先定义好的XML Schema是会随着业务的发展发生变化的，那在进行相关设计时，必须考虑这点，最好就是对于变更的汇集、查询、显示等API都能适应XML Schema的变化。

Therefore, we study the approaches and questions of XML Schema mapping and propose a schema-based approach, which can match XML Schema automatically. Through the rich content of XML Schema and the well-composed mapping approach, we can produce more accurate mapping results.

因此，本研究探讨XML纲要映对的相关方法及问题，并以纲要映对为基础，提出一个XML Schema的自动纲要映对架构，藉由XML Schema丰富的内容及混合的比对方法，更精确的比对出纲要之间的映对关系。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。