OSM-L: Queries

1. Predicate calculus (with text symbols, e.g., ? is exists).

2. Path Expressions.

GuestNr(x) with Name(y) where exists z exists w (Guest(z) has

GuestNr(x) and Guest(z) has Name(y) and Guest(z) has

reservation on ArrivalDate(10 May) for Room(w))

RoomNr(1).Name

ArrivalDate(10 May).Guest.Name

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