How i can get the custom tags available in shopify but not in core liquid?

[basitbiz]

I am working with themes compatible with Shopify but they are using some tags which do not exist in liquid but work in Shopify. Can I get a reference or an idea of how can I embed it in my system to make it work like Shopify? Following are some of the missing tags which throw an error if try to compile. Section tag, form tag, template tag, pagination tag, schema tag, layout tag.