新特性
l 随心所欲的 XSD schema 验证：

| One of the many features to aid the user is schema validation as-you-type. By using data typing, or by implementing a custom type in the Schema, you can force the XML in Word or Excel to be validated on the fly. This validation can be applied while exporting or saving too. For example, you can specify that XML that is not well formed cannot be saved. The schema can specify other validation as well. For example, if the schema specifies an enumeration, and the user enters a choice that is not in the enumeration, the text will appear with a red squiggly line similar to what Word uses for a misspelled word. The user can right-click to see what needs to be done to correct the problem.