European Cultural Heritage Strategy for the 21 st century „ Page 52 — The Venn diagram below illustrates how three components of heritage policy are integrated by the means of direct (diagonal, non-overlapping) and indirect (non-diagonal, overlapping) links between strategy recommendations and challenges. Figure 1: Venn diagram of European Cultural Heritage Strategy for the 21st century Source: Table 2. — Heritage policy (or heritage-related measures or even projects) will increase in coherence when the inner area of intersection increases by implementing its recommendations. A specific heritage policy, mea- sure or project proves to be more integrated when coherence between interfaces increases in parallel with improved effectiveness in all three components. S1, S2, S3, S4, S5, S6, S7, S8, S9, S10 S1, S2, S3, S5, S6, S7, S8, S9, S10 and D1, D2, D3, D5, D6, D7, D11 S1, S2, S3, S5, S6, S7, S8, S9 and D1, D2, D3, D5, D6, D7, D11 and K6 K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, K11 D1, D2, D3, D4, D5, D6, D7, D8, D10, D11 and K6 S1, S2, S3, S4, S5, S6, S7, S8, S9, and K1 D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11