Man pages matching name tangram::relational::mappings in section 3pm:

Tangram::Relational::Mappings.3pm.en	debian 10 / libtangram-perl
Tangram::Relational::Mappings.3pm.en	debian 11 / libtangram-perl
Tangram::Relational::Mappings.3pm.en	debian 12 / libtangram-perl