Robots Meta tag is implemented to control the crawling and indexing of that particular page. But in some cases, the implementation of a Robots Meta tag is not possible. The reasons can be
In such a case, X-Robots-Tag is the solution. An X-Robots-Tag is an element in HTTP header which can contain same values as the Robots META tags.
This can be done using by sever-side tools so that this information is generated by web server.
Given below is the example to avoid indexing .doc files through .htaccess.
Header set X-Robots-Tag “NOINDEX, NOFOLLOW”
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