Classes providing SDF file support.
{@link org.jasig.portal.rendering.sax.xslt.legacy.persistance.LegacyStylesheetDescriptionDao} is a
{@link org.jasig.portal.rendering.sax.xslt.persistance.IStylesheetDescriptionDao} that can read stylesheet description
from the uPortal2 SDF files. A helper {@link org.jasig.portal.rendering.sax.xslt.legacy.persistance.ILegacyStylesheetLocator}
class is used to locate the SDF files given {@link org.jasig.portal.rendering.sax.xslt.IStylesheetId}.