From Mageia wiki
Name : lib64icu44 Relocations: (not relocatable) Version : 4.4.2 Vendor: Mageia.Org Release : 2.1.mga1 Build Date: Fri 30 Dec 2011 03:55:15 GMT Install Date: Mon 09 Jan 2012 11:21:24 GMT Build Host: jonund Group : System/Libraries Source RPM: icu-4.4.2-2.1.mga1.src.rpm Size : 18619120 License: MIT Signature : RSA/SHA1, Fri 30 Dec 2011 03:58:17 GMT, Key ID b742fa8b80420f66 Packager : Mageia Team <http://www.mageia.org> URL : http://www.icu-project.org/index.html Summary : Libraries for the International Components for Unicode Description : Libraries for the International Components for Unicode. icu-4.4.2-2.1.mga1 lib(64)icu44-4.4.2-2.1.mga1 lib(64)icu-devel-4.4.2-2.1.mga1 icu-doc-4.4.2-2.1.mga1 from icu-4.4.2-2.1.mga1.src.rpm.
$ urpmq --whatrequires lib64icu44
Shows several applications use the library including libreoffice, the game openttd and the ebook reader calibre.
Running strace while using libreoffice or playing openttd for example shows it loading the library. If running without strace shows no errors so it should be OK to validate.
$ strace -o strace.out openttd $ grep icu strace.out open("/usr/lib64/libicui18n.so.44", O_RDONLY) = 3 open("/usr/lib64/libicuuc.so.44", O_RDONLY) = 3 open("/usr/lib64/libicudata.so.44", O_RDONLY) = 3 $ rpm -qif /usr/lib64/libicui18n.so.44 Name : lib64icu44 Relocations: (not relocatable) Version : 4.4.2 Vendor: Mageia.Org Release : 2.1.mga1 Build Date: Fri 30 Dec 2011 03:55:15 GMT Install Date: Mon 09 Jan 2012 11:21:24 GMT Build Host: jonund Group : System/Libraries Source RPM: icu-4.4.2-2.1.mga1.src.rpm $ rpm -qif /usr/lib64/libicuuc.so.44 Name : lib64icu44 Relocations: (not relocatable) Version : 4.4.2 Vendor: Mageia.Org Release : 2.1.mga1 Build Date: Fri 30 Dec 2011 $ rpm -qif /usr/lib64/libicudata.so.44 Name : lib64icu44 Relocations: (not relocatable) Version : 4.4.2 Vendor: Mageia.Org Release : 2.1.mga1 Build Date: Fri 30 Dec 2011 03:55:15 GMT