Personal nu cred ca va fi integrat in SQL CE. Insa HierarchyID fiind implementat in .NET probabil exista (sau va exista) o solutie de folosire. (Poate prin LINQ to SQL).

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Cristian Andrei Lefter, SQL Server MVP
MCT, MCSA, MCDBA, MCAD, MCSD .NET,
MCTS, MCITP - Database Administrator SQL Server 2005
http://sqlserver.ro