def p_attrib(self, p):
pass<EOL>
attrib : spdx_version
                  | spdx_id
                  | data_lics
                  | doc_name
                  | ext_doc_ref
                  | doc_comment
                  | doc_namespace
                  | creator
                  | created
                  | creator_comment
                  | locs_list_ver
                  | reviewer
                  | review_date
                  | review_comment
                  | annotator
                  | annotation_date
                  | annotation_comment
                  | annotation_type
                  | annotation_spdx_id
                  | package_name
                  | package_version
                  | pkg_down_location
                  | pkg_home
                  | pkg_summary
                  | pkg_src_info
                  | pkg_file_name
                  | pkg_supplier
                  | pkg_orig
                  | pkg_chksum
                  | pkg_verif
                  | pkg_desc
                  | pkg_lic_decl
                  | pkg_lic_conc
                  | pkg_lic_ff
                  | pkg_lic_comment
                  | pkg_cr_text
                  | file_name
                  | file_type
                  | file_chksum
                  | file_conc
                  | file_lics_info
                  | file_cr_text
                  | file_lics_comment
                  | file_notice
                  | file_comment
                  | file_contrib
                  | file_dep
                  | file_artifact
                  | extr_lic_id
                  | extr_lic_text
                  | extr_lic_name
                  | lic_xref
                  | lic_comment
                  | unknown_tag