EPEL, or Extra Packages for Enterprise Linux, is a yum repository designed to offer some packages from Fedora and other places to Red Hat Enterprise Linux, and therefore also to CentOS. It's not suitable for use on a Fedora system, sorry.
To follow up on cjc's comment, above, he's right. I'm running F16 on my desktop, and yum install
seems to find everything it needs right there in the Fedora repository:
[root@risby ez-pine-gpg]# cat /etc/redhat-release
Fedora release 16 (Verne)
[root@risby ez-pine-gpg]# yum install couchdb
Loaded plugins: refresh-packagekit
Resolving Dependencies
[...many lines removed...]
Dependencies Resolved
==================================================================================================================================================================================
Package Arch Version Repository Size
==================================================================================================================================================================================
Installing:
couchdb i686 1.0.3-2.fc16 fedora 533 k
Installing for dependencies:
erlang-compiler i686 R14B-04.1.fc16 fedora 984 k
erlang-crypto i686 R14B-04.1.fc16 fedora 51 k
erlang-erts i686 R14B-04.1.fc16 fedora 1.4 M
erlang-et i686 R14B-04.1.fc16 fedora 198 k
erlang-eunit i686 R14B-04.1.fc16 fedora 139 k
erlang-gs i686 R14B-04.1.fc16 fedora 606 k
erlang-hipe i686 R14B-04.1.fc16 fedora 1.0 M
erlang-ibrowse i686 2.2.0-4.fc16 fedora 96 k
erlang-inets i686 R14B-04.1.fc16 fedora 755 k
erlang-kernel i686 R14B-04.1.fc16 fedora 1.0 M
erlang-mnesia i686 R14B-04.1.fc16 fedora 663 k
erlang-mochiweb i686 1.4.1-5.fc16 fedora 338 k
erlang-oauth i686 1.0.1-2.fc15 fedora 27 k
erlang-observer i686 R14B-04.1.fc16 fedora 206 k
erlang-public_key i686 R14B-04.1.fc16 fedora 396 k
erlang-runtime_tools i686 R14B-04.1.fc16 fedora 211 k
erlang-sasl i686 R14B-04.1.fc16 fedora 268 k
erlang-ssl i686 R14B-04.1.fc16 fedora 379 k
erlang-stdlib i686 R14B-04.1.fc16 fedora 2.2 M
erlang-syntax_tools i686 R14B-04.1.fc16 fedora 324 k
erlang-tools i686 R14B-04.1.fc16 fedora 536 k
erlang-webtool i686 R14B-04.1.fc16 fedora 45 k
erlang-wx i686 R14B-04.1.fc16 fedora 2.5 M
erlang-xmerl i686 R14B-04.1.fc16 fedora 940 k
Transaction Summary
==================================================================================================================================================================================
Install 1 Package (+24 Dependent packages)