How to retrieve classification codes using keywords?

[mpriestley]

Hello,

I'm trying to get a list of relevant CPC subgroups based on a keyword. Here is the URL I have tried using so far: http://ops.epo.org/3.1/rest-services/classification/cpc/search?q=keyword

...this gives relevant high-level classification symbols, but I would like more detail in terms of the exact CPC subgroups that are relevant. For example, if I manually do a keyword search here: http://worldwide.espacenet.com/classification?locale=en_EP ...it is possible to view drop-down lists of the relevant subgroups.

Could you please advise me if it is possible to access the same level of detail via the open patent services?

Thanks in advance for your help

[EPO / OPS Support]

Dear user,

It is possible to get the same level of detail via OPS, only you might need to do more than one request.

Espacenet is an application designed for end users, thus with a features aiming at making the search experience smooth and informative. You can use OPS to provide similar features: you can read about the CPC classification service on the OPS user guide on page 117 and following.

The example you are quoting translates possibly in two queries:

• First OPS query with a keyword: http://ops.epo.org/3.1/rest-services/cl ... =parachute
  Second OPS query to expand one specific classification code (in this case B64D1/00) retrieved by query number 1: http://ops.epo.org/3.1/rest-services/cl ... ?depth=all

Kind regards

OPS support