I'm making a presentation for the my music project and I need to write a section on articulation markings. But I'm not really sure about what counts as articulation markings. For example, are the markings for piano pedals articulation marks or is it just things like staccato notes and slurs? Also are breath marks, trills and glissandos articulation markings or are they named under another category?
'Articulation' is how something is played. So, any mark that gives an indication to that effect is legitimate. All of those mentioned are game. They show more than 'this is the note you play' but 'this is how you are expected to play it'. Thus importantly, staccato and legato, phrase marks and slurs. Since articulation is more about how notes are connected to each other, pedal markings (damper, sostenuto) are part of it too.
Glissando and portamento would also come under the banner, describing how notes are joined with each other. I am not including in 'how' notes are played any dynamics, attack marks, etc. They won't be part of the joining that the term articulation means.(Reference Peter's comment).
Also are breath marks, trills and glissando's articulation markings or are they named under another category?
Actually, yes there are, piano uses a slur marking,which looks very similar to a tie but it runs to a separate note, stacatto's and rests are indicators that tell us to play notes seperated, for example in the "Mission Impossible" theme (no not the bastardized version Tom Cruise used, the real one! ) the left hand is playing seperated notes (stacatto 8th notes), the right hand (played with flutes) is played slurred (1 e and (u 2 and 3 and) )!
"Orochi" by Kitaro (same time siganture by the way ) pretty much does the same thing, the left hand is seperated, this time by stacatto quarted notesm, the right hand is mostly slured.
So voice marks, of a type , do exist in piano music!
Articulation markings denote how notes should be connected to or separated from each other. So slurs, portato, staccato, tenuto, and markings like those count as articulations.
Pedal markings don't count. Dynamics don't count. Breath marks, trills, and glissandos don't count.
Trills, turns, mordents, and more--markings that substitute notes with collections of other related notes (and often with the same note interspersed)--are called ornaments.