Man pages matching name pmdaattribute in section 3:

pmdaAttribute.3.en	debian 10 / libpcp-pmda3-dev
pmdaattribute.3.en	debian 10 / libpcp-pmda3-dev
pmdaAttribute.3.en	debian 11 / libpcp-pmda3-dev
pmdaAttribute.3.en	debian 12 / libpcp-pmda3-dev