It appears you can still search by facet in LS2 PAC.
format:"[attribute name]" i.e. format:"Book"
series:"[attribute name]" i.e. series:"Magic Tree House"
author:"[attribute name]"
collection:"[attribute name]"
year:"[attribute name]" for publication year
subject:"[attribute name]"
targetaudience:"[attribute name]"
genre:"[attribute name]"
(It seems that quotes are optional for single words , but necessary for phrases.)