 Sure, here's an example of a DECLARE model for a Purchase-to-Pay (P2P) process:
```python
# Initialize variables and set the support and confidence values to 1.0 for all declarative rules
activities = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0},
    'C': {'support': 1.0, 'confidence': 1.0},
    'D': {'support': 1.0, 'confidence': 1.0}
}

existence = {
    'A': activities['A'],
    'B': activities['B'],
    'C': activities['C'],
    'D': activities['D']
}

absence = {
    'A': activities['A'],
    'B': activities['B'],
    'C': activities['C'],
    'D': activities['D']
}

exactly_one = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

init = {
    'A': {'support': 1.0, 'confidence': 1.0}
}

responded_existence = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

coexistence = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

response = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

precedence = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

succession = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

altresponse = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

altprecedence = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

altsuccession = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

chainresponse = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

chainprecedence = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

chainsuccession = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

noncoexistence = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

nonsuccession = {
    'A': {'support': 1.0, 'confidence': 1.0},
    'B': {'support': 1.0, 'confidence': 1.0}
}

nonchainsuccession = {
    'A': {'support': 1.0, 'confidence': 1.0},
```