dateTime Lexical Representation

<snip section="3.2.7.1" at="http://www.w3.org/TR/xmlschema-2/#dateTime">
A single lexical representation, which is a subset of the lexical 
representations allowed by [ISO 8601] 
<http://www.w3.org/TR/xmlschema-2/#ISO8601>, is allowed for *dateTime*. 
This lexical representation is the [ISO 8601] 
<http://www.w3.org/TR/xmlschema-2/#ISO8601> extended format 
CCYY-MM-DDThh:mm:ss where
....
</snip>

Does this indicates XML Schema Datatypes specification allows ONLY 
format with "-" for datetime?

How about per [ISO 8601:1988] where one particular format among the many 
suggested formats is CCYYMMDDThhmmss.sssZ?

kamarul