The term ostensive definition is identified in base64 scheme by the sequence b3N0ZW5zaXZlIGRlZmluaXRpb24=, while the MD5 signature is equal to 648c00b239dde29bb77951628e63deb9. The ASCII encoding of ostensive definition in hexadecimal notation is 6f7374656e7369766520646566696e6974696f6e.