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XML的显示——XSL样式单(上)

1:XML文档转换原理$$数据格式转换的重要思想是要把XML文档视为一种树结构,转换的过程就是从源树生成结果树的过程。XSL样式单定义了源树和结果树中对应部分的转换规则,每条规则中包含了一个模板,并对应着一种模式。模板定义了转换的结果,而模式则规定了需要进行转换的元素或属性对象。$$XML中引用XSL的语法格式如下:$$<?xml-stylesheet type=“text/xsl” href=“Employees.xsl”?>$$如果在声明部分引用了多个XSL样式单,则只有第一个样式单会生效,其余的都会被忽略掉。$$XSL的格式转换功能在复杂的电子商务解决方案中大有用武之地。比如,A公司和B公司都是生产机器零件的厂家,在货物清单中都包含了产品序列号以及质量等级评分。A公司的文件格式如下:$$<Order>$$<OrderItem>$$<ItemID>12980-235</ItemID>$$<Quantity>200</Quan...  (本文共4页) 阅读全文>>

《Chinese Chemical Letters》2017年11期
Chinese Chemical Letters

A facile template approach for the synthesis of mesoporous Fe_3C/Fe-Ndoped carbon catalysts for efficient and durable oxygen reduction reaction

Oxygen reduction reaction(ORR)is critically important formany advanced electrochemical energy conversion devices such asmetal-air batteries,fuel cells,and chlor-alkali electrolyzers.Developing low-cost and high-performance electrocatalysts toreplace the currently used Pt-based materials is highly desirablefor successful implementation of above electrochemical devices inthe near future[1–5].Therefore,great efforts hav...  (本文共5页) 阅读全文>>

《Chinese Chemical Letters》2013年03期
Chinese Chemical Letters

Synthesis and properties of template-promoted switchable dithienylethenebased macrocycles

1 .Introduction In reeent decades,macrocyelie chemistry has been develoPedinto a major field of suPramolecular chemistry due to itsimPortant role Playing in host一guest ehemistry!1一4』,suPramo-lecular self-assembly【5.6』and 50 on【71.Macrocyclic structuresw ith shaPed一Persistent have been largely synthesized.esPeciallyin folly叮一conjugatedbaekbones.andhavebeenusedinthefieldofmaterial science.In comParison to shaPed一Persis...  (本文共3页) 阅读全文>>

《Chinese Journal of Library and Information Science》2013年01期
Chinese Journal of Library and Information Science

Implementation of a weblog extraction system with an improved template extraction technique

1 IntroductionWeblog,also called online personal diary or journal,is a very popular mediumthrough which people express their opinions and emotions on the Internet.Accordingto statistics released by the China Internet Network Information Center,the numberof blog users in China has increased up to 318 million by the end of June,2011[1].Blogs,especially academic blogs,provide us with a wealth of valuable informationreso...  (本文共12页) 阅读全文>>

《Transactions of Nonferrous Metals Society of China》2008年03期
Transactions of Nonferrous Metals Society of China

Preparation and characterization of La-Co alloy nanowire arrays by electrodeposition in AAO template under nonaqueous system

1 Introduction Recently, nanosized materials, such as nanoparticle, nanowire and nanoarray have received much attention due to their extraordinary electronic[1], optical[2] and chemical[3] properties. In order to obtain nanostructure, several technologies, such as lithographic method and the bottom up approach, have been developed to promote the progress. The anodic aluminum oxide(AAO) template medium technique is cu...  (本文共6页) 阅读全文>>

《Transactions of Nonferrous Metals Society of China》2007年04期
Transactions of Nonferrous Metals Society of China

Controlled synthesis of highly ordered CuO nanowire arrays by template-based sol-gel route

1 Introduction In the past decade, metal oxide nanowires of wide band gap n-type semiconductors, such as TiO2[1?2], CdS[3], ZnO[4] and SiO2[5], have attracted much attention because of their novel optical, catalytic and magnetic properties. There is considerablely scientific and technological interest in developing nanostructured metal oxides with p-type semiconductivity. Cupric oxide(CuO) is one of the most importan...  (本文共4页) 阅读全文>>