##sitemaps cse and pagemaps
from https://developers.google.com/custom-search/docs/structured_data#addtopage
Add PageMap data to a Sitemap
If you don't want to include PageMap data in the HTML of your pages, you can add PageMap data to a Sitemap and submit that Sitemap for on-demand indexing using the Custom Search Control Panel.
Here's an example of a Sitemap that includes PageMap information for two URLs: http://www.example.com/foo and http://www.example.com/bar.
http://www.example.com/foo Dragon 3.5 http://www.example.com/bar Ribs 4.0
Submit PageMap data using the Custom Search Control API
To submit PageMap data using the Custom Search Control API, send an HTTP POST message, using the text/xml content type, to: http://cse.google.com/api/default/index/<CSE_ID>. Include PageMap data in the message body, like this:
Monkeys 4.0/5.0 1000 100 Parrots 4.5/5.0 2000 200Private PageMaps
In some cases, you may not want custom attributes returned in your search engine's query results XML, because those are publicly visible by default. In this case, you can create a private PageMap by adding an AccessKey to the DataObject you want to protect, and sending the PageMap directly to Google using the on-demand indexing API. Only web searches with a matching AccessKey parameter will get that DataObject in results.
Here's an example of an AccessKey in use:
myprivate12345 1000 100An AccessKey can consist of no more than 30 alphanumeric characters.
To retrieve protected data, specify the AccessKey in the pgmpk parameter. For example, if your AccessKey is myprivate12345, your query URL might look like this:
https://www.google.com/cse?cx=[CSEID]&q=animal&output=xml&pgmpk=myprivate12345
See a full list of supported parameters.
To restrict results to protected data, update your search URL to append the AccessKey value to the more:pagemap:TYPE-NAME:VALUE operator, like this:
To sort by protected data, update your search URL to append the AccessKey value to the &sort=TYPE-NAME:DIRECTION parameter, like this: