def namespace_array(ns_key):
obs_sch = namespace(ns_key)<EOL>obs_sch['<STR_LIT:title>'] = '<STR_LIT>'<EOL>sch = copy.deepcopy(JAMS_SCHEMA['<STR_LIT>']['<STR_LIT>'])<EOL>sch['<STR_LIT>'] = obs_sch<EOL>return sch<EOL>
Construct a validation schema for arrays of a given namespace.

    Parameters
    ----------
    ns_key : str
        Namespace key identifier

    Returns
    -------
    schema : dict
        JSON schema of `namespace` observation arrays