This Parameter Entity is typically set to include the JATS entity %inside-cell;, to control what JATS elements, if any, will be permitted in an <oasis:entry> element. Best Practice is to change the content of the %inside-cell; Parameter Entity to change the content of a cell and not to set the %paracon; Parameter Entity directly.

<!ENTITY % paracon      "#PCDATA | %inside-cell;"                    >

The official OASIS Exchange (CALS) Table Model documentation can be found at http://www.oasis-open.org/specs/a502.htm