I am new to work on AEM Forms, I have the usecase to prefill form fields, some fields from a rest service call, can you please provide me some link which explains how to do this, also I am using AEM 6.3 forms, so have to use features of AEM 6.3 forms only, not the traditional ways to prefill data.
Thanks for your response
Moving this question to "AEM Forms" topic so that contextual expert can help you.
Please refer to following document:
You may want to see 'AEM Forms prefill service' section in it.
We have also introduced Data Integrations in this release, please do check : https://helpx.adobe.com/aem-forms/6-3/data-integration.html