Problems with XML schema

XML schema can handle previous example using locally-scoped element names
but what about the following?
- a document (doc element) contains one or more paragraphs (par elements)
- the first paragraph has a different content model to subsequent paragraphs
- (perhaps the first letter of the first paragraph is enlarged)
we want something like
```
<!ELEMENT doc  (par, par*) >
```
but where two occurrences of par have different content models
this cannot be specified in XML schema