When putting prefix for ogp.me in html amp page and validating I get error message prefix not allowed at top level html. What is the solution?
Based from the documentation: AMP HTML Tag Addendum
AMP HTML allows for most HTML5 standard tags and a few additional tags specific to the AMP runtime. The AMP Spec broadly defines the set of tags that are disallowed. AMP Validator implementations, however, must be implemented using a tag whitelist. This addendum lists the set of tags which an AMP Validator should whitelist.
If an HTML tag is not in this list, the AMP Validator does not consider that tag valid in any context. However, many of these tags have additional restrictions. For example
<script>is in the list, but custom javascript is not allowed.
The only solution for this, would be removing the prefix which invalidates the AMP page.