When entering an invalid value, error is rather scarce:
Some property value format can be confusing, such as P268 (BNF id): is a valid id 13516296h or cb13516296h ?
User experience could be improved by giving some information about what is valid format possibility. This could be done, for example, by pulling value of format as a regular expression on Wikidata property page and display it in the error message.
Another way could be to add a valid placeholder in text field
When entering an invalid value, error is rather scarce:
Some property value format can be confusing, such as P268 (BNF id): is a valid id
13516296horcb13516296h?User experience could be improved by giving some information about what is valid format possibility. This could be done, for example, by pulling value of format as a regular expression on Wikidata property page and display it in the error message.
Another way could be to add a valid placeholder in text field
Related issue: #395