| ERROR | attribute value should be one or more tokens |
| CAUSE | An attribute with tokenized type (IDREFS, ENTITIES, NMTOKENS) did not contain any tokens. |
| ACTION | Value must contain one or more tokens, separated by spaces. |
| ERROR | attribute value should be one or more tokens |
| CAUSE | An attribute with tokenized type (IDREFS, ENTITIES, NMTOKENS) did not contain any tokens. |
| ACTION | Value must contain one or more tokens, separated by spaces. |