in lipsa unui context, as zice ca e vorba de un semniar cu valoare de referinta (adica foarte valoros)

cap·stone [ káp stn ] (plural cap·stones)


noun

Definition:

1. top stone: a stone used at the top of a wall or another structure


2. high point: something considered the highest achievement or most important action in a series of actions

utilizand acelasi link de mai sus observam ca e vorba intr-adevar de un seminar important - unul care incununeaza o serie de seminare insa, nu pur si simplu de referinta
si cercetand dictionarul englez francez obtinem mai multa informatie :
http://www.wordreference.com/enfr/capstone
capstone:
capstone (final touch) nf touche finale
capstone (crowning achievement) nm chef-d'œuvre