Tree patterns are collected together to form a Schematron schema.
Schematron is a useful and accessible supplement to other schema languages.
You might also have certain restrictions on the values.
Even if users correctly enter an integer, for example, you might need to make sure that the value falls within a certain range.
If you imagine form as a dialog between your website and your user, the messages play an important role.
Don’t leave it to the auto-generated default messages.
The open-source XSLT implementation is based around a core framework which is open for extension and customisation.
This paper introduces the Schematron language and the available implementations.
It is easy for an end user to make a mistake when they are entering data or even to leave out important details that must be entered, so we need to check this data when it is being entered into the database.
If you skip the messages parameter, the plugin will display default, auto-generated messages.
However, You should always customize the validation error messages.
If you skip the message for a validation, the default message is displayed.
See a complete demo @Codepen The messages parameter is optional.