基于SGML的电子公文标准化研究与实现

文中通过对现有国家行政机关公文处理流程的研究，提出并具体实现了一个基于ＳＧＭＬ的电子公文标准。按照国家有关规定制定了一个电子公文的ＳＧＭＬ文件类型定义，设计了一个电子公文的ＳＧＭＬ模板，并开发一下带有语法制导功能的ＳＧＭＬ公文编辑器，对生成的ＳＧＭＬ格式公文还提供了转换器，实现了网上电子文化的标准化。     

SGML语言的编译实现

ｓｇｍｌｔｏｏｌ是作者开发的一种支持各类ＳＧＭＬ应用系统的编译系统。ｓｇｍｌｔｏｏｌ动态解释ＤＴＤ和ＳＧＭＬ文档，将后者转换成一种规范化的内部结构，并保存到面向对象数据库ＯＳＣＡＲ中。ＯＳＣＡＲ中规范的ＳＧＭＬ数据结构２可作为其它ＳＧＭＬ应用系统的基础。     

New—UIGMS——界面工具＋方法

本文着重介绍了Ｎｅｗ－ＵＩＧＭＳ在人机界面设计和实现中的作用。Ｎｅｗ－ＵＩＧＭＳ以将界面编辑器和界面动态流程控制设计相结合的方法,向界面设计人员提供了支持。     

XML——新的Web开发工具

ＸＭＬ是当前Ｗｅｂ技术领域的热点,它源于ＳＧＭＬ是ＳＧＭＬ的一个子集,文中,介绍ＸＭＬ的起源和特点,给出一个示例说明怎样书写ＸＭＬ文档,并简要介绍ＸＭＬ的应用和未来。     

基于PostScript的标准通用置标语言文档输出系统

标准通用置标语言（ＳＧＭＬ）是一种描述型置标语言，它提供一组规则供文档设计者定义文档的结构。本文简要介绍ＳＧＭＬ语言的产生、发展、基本特征和文档结构等内容，然后结合我们自己的工作对ＳＧＭＬ到页面描述语言ＰｏｓｔＳｃｒｉｐｔ的转换方法进行了讨论，并给出了简单例子。     

SDL—TRAN：一个形式描述语言SDL的交互式生成器

本文报告一种能将ＦＳＭ自动转换为ＳＤＬ描述的ＳＤＬ描述生成器－ＳＤＬ－ＴＲＡＮ。除了自动变换部分之外，ＳＤＬ－ＴＲＡＮ还包含一个具有友好用户接口的图形编辑器。     

A NEW PLANAR BOOLEAN OPERATIO ALGORITHM BASED ON LINE SEGMENT SORTING

ＡＮＥＷＰＬＡＮＡＲＢＯＯＬＥＡＮＯＰＥＲＡＴＩＯＮＡＬＧＯＲＩＴＨＭＢＡＳＥＤＯＮＬＩＮＥＳＥＧＭＥＮＴＳＯＲＴＩＮＧＭａＬｉｎ；ＤｕＸｉｑｉｎｇ；ＧｕａｎＲｏｎｇｃｈａｎｇＳＭＯＯＴＨＳＵＲＦＡＣＥＩＮＴＥＲＰＯＬＡＴＩＯＮＯＶＥＲＡＲＢＩＴＲＡ...     

如何用活注册表

为回收站改名 我们可以很容易地改变桌面上大多数图标的名字，但却不能直接给回收站改名。如果您想改变“回收站”的名字，只有在注册表编辑器中将ＨＫＥＹ—ＣＬＡＳＳ－ＥＳ—ＲＯＯＴ＼ＣＬＳＩＤ＼ ｛６４５ＦＦ０４０—５０８１－１０１Ｂ－９Ｆ０８－００ＡＡ００２Ｆ９５４Ｅ｝右窗口键的“默认”值由“回收站”改为其它的名字（如“垃圾筒”）。关闭注册表编辑器，重启Ｗｉｎｄｏｗｓ，就会发现原来的“回收站”变成了“垃圾筒”。 改变“我的电脑”、“回收站”的图标 在Ｗｉｎｄｏｗｓ中，不能像修改一般文件的图标那样来更改“我…     

如何用活注册表

１为回收站改名 我们可以很容易地改变桌面上大多数图标的名字,但却不能直接给回收站改名。如果您想改变“回收站”的名字,只有在注册表编辑器中将ＨＫＥＹ—ＣＬＡＳＳＥＳ－ＲＯＯＴ＼ＣＬＳＩＤ＼｛６４５ＦＦ０４０— ５０８１—１０１Ｂ—９Ｆ０８一００ＡＡ００２Ｆ９５４Ｅ｝右窗口键的“默认”值由“回收站”改为其它的名字（如“垃圾筒”）,关闭注册表编辑器,重启Ｗｉｎ９５,就会发现原来的“回收站”变成了“垃圾筒”。２改变“我的电脑”、“回收站”的图标 在 Ｗｉｎ ９５中,不能像修改一般文件的图标那样来更改“我的电…     

HTML向何处去

近期，ｗｗｗ协会（Ｗ３Ｃ）将推荐扩展标记语言ＸＭＬ（ｅｘｔｅｎｓｉｂｌｅＭａｒｋｕｐＬａｎｇｕａｇｅ）１．０作为超文本标记语言ＨＴＭＬ之后的又一个标准。ＸＭＬ与ＨＴＭＬ一样，都是ＳＧＭＬ（ＳｔａｎｄａｒｄＧｅｎｅｒａｌｉｚｅｄＭａｒｋｕｐＬａｎｇｕａ...     

基于SGML/XML的文件结构化研究与实现

由于计算机普及和Internet发展的迅速，信息传播和利用的多样化对信息的标准化需求日趋迫切，依照SGML／XML语言，从分析文件结构入手，设计文件类型定义（DTD），并用结构制导方法实现文件编辑器，以自动生成符合DTD语法的结构化文件，而达到文件信息的标准化要求。     

SGML and XML Document Grammars and Exceptions

The Standard Generalized Markup Language (SGML) and the Extensible Markup Language (XML) allow users to define document-type definitions (DTDs), which are essentially extended context-free grammars expressed in a notation that is similar to extended Backus–Naur form. The right-hand side of a production, called a content model, is both an extended and a restricted regular expression. The semantics of content models for SGML DTDs can be modified by exceptions (XML does not allow exceptions). Inclusion exceptions allow named elements to appear anywhere within the content of a content model, and exclusion exceptions preclude named elements from appearing in the content of a content model. We give precise definitions of the semantics of exceptions, and prove that they do not increase the expressive power of SGML DTDs when we restrict DTDs according to accepted SGML practice. We prove the following results:1. Exceptions do not increase the expressive power of extended context-free grammars.2. For each DTD with exceptions, we can obtain a structurally equivalent extended context-free grammar.3. For each DTD with exceptions, we can construct a structurally equivalent DTD when we restrict the DTD to adhere to accepted SGML practice.4. Exceptions are a powerful shorthand notation—eliminating them may cause exponential growth in the size of an extended context-free grammar or of a DTD.     

一个从关系数据模型到XML文档的翻译器设计

XML技术与关系数据模型的关系非常密切,将关系数据库中的数据转换为XML文档格式有着重要的现实意义,本文介绍了利用OmniMark语言开发一个从关系数据模型到XML文档翻译器的方法,重点分析了关系模式、DTD与XMLSchemas,跨平台无关性,SGML语法检查等关键技术。     

Graphic applications of the Standard Generalized Markup Language (SGML)

The Standard Generalized Markup Language (SGML) is a language for representing document structure. This paper discusses ways in which the SGML language might be used to represent graphic as well as textual contents of a document. By using SGML markup for both graphics and text, a document processing application can achieve a more uniform treatment and tighter coupling between these two types of materials.     

MtScript: A Multi Lingual Text Editor

This paper describes the multilingual text editor MtScript developed in the framework of the MULTEXT project.MtScript enables the use of many differentwriting systems in the same document (Latin, Arabic,Cyrillic, Hebrew, Chinese, Japanese, etc.). Editingfunctions enable the insertion or deletion of textzones even if they have opposite writing directions.In addition, the languages in the text can be marked,customized keyboard input rules can be associated witheach language and different character coding systems(one or two bytes) can be combined. MtScript isbased on a portable environment (Tcl/Tk). MtScript.1.1version has been developed underUnix/X-Windows (Solaris, Linux systems) and otherversions are planned to be ported to the Windows andMacintosh environments. The current 1.1 versionpresents several limits that will be fixed in futureversions, such as the justification of bi-directionaltexts, printing support, and text import/exportsupport. Future versions will use SGML and TEI norms,which offer ways of encoding multilingual texts andare to a large extent meant for interchange.     

DTD＆CSS编辑器的设计与实现

首先对DTD和CSS的语法规则进行了简单介绍，然后给出了一个对DTD和CSS进行语法分析和编辑的设计思路，最后给出了编辑器的实现效果以及对下一步工作的展望。     

Structured document storage and refined declarative and navigational access mechanisms in HyperStorM

The combination of SGML and database technology allows to refine both declarative and navigational access mechanisms for structured document collection: with regard to declarative access, the user can formulate complex information needs without knowing a query language, the respective document type definition (DTD) or the underlying modelling. Navigational access is eased by hyperlink-rendition mechanisms going beyond plain link-integrity checking. With our approach, the database-internal representation of documents is configurable. It allows for an efficient implementation of operations, because DTD knowledge is not needed for document structure recognition. We show how the number of method invocations and the cost of parsing can be significantly reduced. Edited by Y.C. Tay. Received April 22, 1996 / Accepted March 16, 1997     

Error tolerant document structure analysis

Successful applications of digital libraries require structured access to sources of information. This paper presents an approach to extract the logical structure of text documents. The extracted structure is explicated by means of SGML (Standard Generalized Markup Language). Consequently, the extraction is achieved on the basis of grammars that extend SGML with recognition rules. From these grammars parsing automata are generated. These automata are used to partition a flat text document into its elements, to discard formatting information, and to insert SGML markups. Complex document structures and fallback rules needed for error tolerant parsing make such automata highly ambiguous. A novel parsing strategy has been developed that ranks and prunes ambiguous parsing paths.