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* [[Accept Header | Accept]] * [[Accept-Language Header | Accept-Language]]

...tatic and the same for all users you can set the following [[Cache-Control header]]: <code>Cache-Control: public,maxage=300</code> This will keep the resourc ...nges you can use that as an ETag identifier. This is done using the [[ETag Header]]:

...given title. We can do this by sending the following [[Link Header | link header]]: ...e pretty urls we can simply change the server to return the following link header:

...gotiate what kind of formats both support. They do this using the [[Accept Header]]. ...equest to a server it supplies all the formats it supports in the [[Accept Header]]: <code>Accept: text/html,application/xhtml+xml</code>.

...the first page, the [[URL]] for the next page should be set using a [[Link Header]] with <code>rel=next</code>. For subsequent pages, if the resource supports iterating backwards, a Link Header with <code>rel=prev</code> should be added as well.

=== Version Header === A less common approach is to use a [[HTTP Header | header]] like <code>X-API-Version: 1</code> in API requests. There are two approac

# A packet header * Rest of header

...f you are using [[Content Negotiation]] you can implement this by [[Accept Header | accepting]] the `text/html` [[Media Types | Media Type]] and opening a br

...ed in the [[Media-Type specification]] corresponding to the [[Content-Type Header | Content-Type]] you got back from the server.