iteye_1766的博客

1. when to use attribute? difference of attribute and element. use elements for multiple-valued data and attributes for single-valued data 2. dtd, only structure validation. xml schema also have dat...

chapter 1

[b]Ch1.[/b] 1. do what customer what. meet the requirement is always the first priority. 2. then think about using basic OO principle and design pattern 3. encapsulation also for code reuse. encap...

chapter 5: developing a data model 1. attribute, class and relationship 2. two or more relationship between class: cause by a special member or historical data 3. different routes of classes 1....