<MyElem1>This is an example of <b>mixed</b> content</MyElem1>
What it means:
Any text markup is allowed between the opening and closing tags for the element.
Why this is a problem:
First, see the example, above. In the example, it is unclear how data should be mapped to or from properties on a clipboard page. Additionally, when using elements with mixed content, you cannot treat the content the same way that you would treat regular text.
What to do:
First, replace the xs:complexType declaration with the xs:string type in the source XSD and use the accelerator to import it again. Then, to include HTML or markup in the XML, be sure to XML encode the tags embedded in the text. That way, the content can be treated as simple text.