关于CDATA: CRM 的 customization.xml 中大量使用了CDATA
CDATA sections provide a way to tell the parser that there is no markup in the characters contained by the CDATA section. This makes it much easier to create documents containing sections where markup characters might appear, but where no markup is intended. CDATA sections are commonly used for scripting language content and sample XML and HTML content.
http://msdn2.microsoft.com/en-us/library/ms256076.aspx