There are no differences in the declarations of local variables, cursors, temporary tables, but on both platforms the order of declaration is important.
在局部变量、游标和临时表的声明方面，两种平台没什么差别，但在这两种平台上，声明的顺序却很重要。
2
If an element declaration has type alternatives, they are evaluated in the order that they were specified in the schema.
如果元素声明具有类型替换，那么将按照在模式中指定的顺序进行计算。
3
The default namespace declaration, if any, then all other namespace declarations, in alphabetical order of the prefixes they define.