In G127 sufficient technique (https://www.w3.org/TR/WCAG20-TECHS/G127.html#G127-tests), What does one mean by the second step of the procedure mentioned in the test, ie, 'Check if the Web page includes metadata identifying the Web page's relationship to the collection to which it belongs.'?
The G127 is sufficient technique of Success Criteria 2.4.8(Location), where under that sufficient technique, H59 sufficient technique (http://www.w3.org/TR/2016/NOTE-WCAG20-TECHS-20161007/H59) is mentioned.
Is that the solution to test for G127? If not, what is the solution, to check and verify for G127?
"2.4.8: Location" is the success criterion
This success criteria has 4 sufficient techniques:
You have to follow G127 if your content is part of a large collection of a page :
In order to resolve G127 sufficient techniques AND if you use HTML, you can use the H59 technique to solve a subpart of what G127 concerns. Note that its user agent support is very low
If your content is not part of a large collection of pages, providing a breadcrumb trail (G65) is the more common solution.
But it's not because it's sufficient that you should not indicate the current location in navigation bars (G128), or that you can not implement a custom navigation bar to identify page's relationship to a larger collection of Web pages.