| (* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| *) |
| |
| theory I_UsrAttr |
| imports Main "../UsrAttr" I_SysId |
| begin |
| |
| record UsrAttr= |
| usrattr_id::UsrId |
| |
| definition usr_attr::"UsrId\<Rightarrow>UsrAttr" where |
| "usr_attr uid\<equiv>\<lparr>usrattr_id=uid\<rparr>" |
| |
| definition nousrattr::UsrAttr where |
| "nousrattr\<equiv>\<lparr>usrattr_id=nousrid\<rparr>" |
| |
| interpretation UsrAttr : UsrAttr nousrid valid_usrid nousrattr usr_attr usrattr_id |
| proof |
| show "usrattr_id nousrattr = nousrid" by (auto simp:nousrattr_def) |
| next |
| fix uid |
| show " usrattr_id (usr_attr uid) = uid" by (auto simp:usr_attr_def) |
| next |
| fix x |
| show "\<exists>uid. x = usr_attr uid \<or> x = nousrattr" |
| proof |
| show "x = usr_attr (usrattr_id x) \<or> x = nousrattr" by (auto simp:usr_attr_def) |
| qed |
| qed |
| |
| end |
