Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
graphviz-ocaml
graphviz-ocaml(x86-64)
libgv_ocaml.so()(64bit)
ocaml(Gv)
ocaml(Swig)

Requires :

graphviz = 2.30.1-18.el7
libc.so.6()(64bit)
libc.so.6(GLIBC_2.2.5)(64bit)
libc.so.6(GLIBC_2.4)(64bit)
libcdt.so.5()(64bit)
libcgraph.so.6()(64bit)
libexpat.so.1()(64bit)
libgcc_s.so.1()(64bit)
libgvc.so.6()(64bit)
libltdl.so.7()(64bit)
libm.so.6()(64bit)
libpathplan.so.4()(64bit)
libstdc++.so.6()(64bit)
libxdot.so.4()(64bit)
libz.so.1()(64bit)
ocaml
ocaml(Array) = 4d5efba91ec70acd7b184fd4b277708c
ocaml(Callback) = 6fd6d47b2f6a171a493621bc5edbfb32
ocaml(Gc) = 23b8d067f883f7a218c4945a42625a31
ocaml(Hashtbl) = 718cd6ce8bc18371ce22483e362f78b4
ocaml(Int32) = 265928798c0b8a63fa48cf9ac202f0ce
ocaml(Int64) = 0d5ecd8dffcffac43aec2ebe427d3bde
ocaml(List) = bd7c662c09e850306a62c12fed5ef5ce
ocaml(Obj) = ad977b422bbde52cd6cd3b9d04d71db1
ocaml(Pervasives) = 4836c254f0eacad92fbf67abc525fdda
ocaml(Swig) = 925e8ee6cbd8ca86e6d468bf52ba0e88
ocaml(runtime) = 4.00.1
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rtld(GNU_HASH)
rpmlib(PayloadIsXz) <= 5.2-1

Content of RPM :
/usr/lib64/graphviz/ocaml
/usr/lib64/graphviz/ocaml/META.gv
/usr/lib64/graphviz/ocaml/gv.cma
/usr/lib64/graphviz/ocaml/gv.cmi
/usr/lib64/graphviz/ocaml/gv.cmo
/usr/lib64/graphviz/ocaml/libgv_ocaml.so
/usr/share/man/man3/gv.3ocaml.gz