Add an entry in the catalog, it may overwrite existing but
      different entries. If called before any other catalog
      routine, allows to override the default shared catalog put
       in place by xmlInitializeCatalog();

def catalogAdd(type, orig, replace):
    """Add an entry in the catalog, it may overwrite existing but
      different entries. If called before any other catalog
      routine, allows to override the default shared catalog put
       in place by xmlInitializeCatalog(); """
    ret = libxml2mod.xmlCatalogAdd(type, orig, replace)
    return ret