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Deskripcn´ı logika

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Cyklické a acyklické TBOXy<br />

Pˇríklad – CWA × OWA<br />

Example<br />

ABOX<br />

hasChild(JOCASTA, OEDIPUS) hasChild(JOCASTA, POLYNEIKES)<br />

hasChild(OEDIPUS, POLYNEIKES) hasChild(POLYNEIKES, THERSANDROS)<br />

Patricide(OEDIPUS) ¬Patricide(THERSANDROS)<br />

Hrany reprezentují hasChild instance relací a barvy odliˇsují instance<br />

koncept˚u – Patricide a ¬Patricide<br />

<br />

<br />

<br />

<br />

JOCASTA<br />

<br />

OEDIPUS<br />

POLYNEIKES<br />

<br />

THERSANDROS<br />

Dotaz 1 (∃hasChild · (Patricide ⊓ ∃hasChild · ¬Patricide))(JOCASTA),<br />

Dotaz 2 Jaké jsou instance konceptu<br />

((¬Patricide) ⊓ (∃[ − hasChild]) · Patricide ⊓ ∃hasChild − · {JOCASTA}<br />

? Jak by liˇsil v´ysledek, kdybychom uvaˇzovali CWA ?<br />

JOCASTA<br />

Petr Kˇremen (FEL ČVUT) Deskripční <strong>logika</strong> 55 / 157<br />

<br />

x<br />

<br />

y

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