In PaaS, we could create a base page type, and then actual pages inherit from this, ensuring all pages have the same base set of fields. This is very convenient for several reasons:

1. When creating a new page type, I only need to define the fields that are unique to the page type

2. If I want to perform some action that looks at all pages, I have a hard time. I have to explicitly call out each page type for my graph query, and I cannot perform any query type actions like filtering based on fields that are custom to a page type.

For example:

I want to add a check box to all pages called "Exclude From Search". Then I want to create a my site search query. To get all pages I query on type _Page. But I cannot filter for this "Exclude From Search" field on the type _Page.

It would be great to add fields right to _Page, or some other intermediary type, that I can query.