It's frequently useful (and accidentally used) to have <c/> within
<returns/> blocks:
<returns>
<c>-1</c> at end of stream; otherwise the number of bytes read.
</returns>
Allow this to validate.
.fi
The \fIreturns\fR element can contain the following elements:
+\fIc\fR,
+\fIformat\fR,
\fIlist\fR,
\fIpara\fR,
\fIparamref\fR,
<xs:element name="returns">
<xs:complexType mixed="true">
<xs:choice minOccurs="0" maxOccurs="unbounded">
+ <xs:element ref="c" />
<xs:element ref="format" />
<xs:element ref="geq" />
<xs:element ref="leq" />