Here's an example of a DECLARE model for a hypothetical Purchase-to-Pay process, representing some basic constraints:
```python
declare_model = {
    'existence': {
        'Create Purchase Order': {'support': 1.0, 'confidence': 1.0},
        'Send Purchase Order': {'support': 1.0, 'confidence': 1.0},
        'Receive Goods': {'support': 1.0, 'confidence': 1.0},
        'Create Invoice': {'support': 1.0, 'confidence': 1.0},
        'Pay Invoice': {'support': 1.0, 'confidence': 1.0}
    },
    'responded_existence': {
        ('Create Purchase Order', 'Send Purchase Order'): {'support': 1.0, 'confidence': 1.0},
        ('Receive Goods', 'Create Invoice'): {'support': 1.0, 'confidence': 1.0},
        ('Create Invoice', 'Pay Invoice'): {'support': 1.0, 'confidence': 1.0}
    },
    'response': {
        ('Send Purchase Order', 'Receive Goods'): {'support': 1.0, 'confidence': 1.0},
        ('Receive Goods', 'Create Invoice'): {'support': 1.0, 'confidence': 1.0}
    },
    'precedence': {
        ('Create Invoice', 'Receive Goods'): {'support': 1.0, 'confidence': 1.0},
        ('Pay Invoice', 'Create Invoice'): {'support': 1.0, 'confidence': 1.0}
    },
    'init': {
        'Create Purchase Order': {'support': 1.0, 'confidence': 1.0}
    },
    'noncoexistence': {
        ('Create Purchase Order', 'Pay Invoice'): {'support': 1.0, 'confidence': 1.0}
    }
}
```
This DECLARE model enforces the following constraints:

* The activities "Create Purchase Order", "Send Purchase Order", "Receive Goods", "Create Invoice", and "Pay Invoice" must occur at least once (`existence` constraint).
* If "Create Purchase Order" occurs, then "Send Purchase Order" must occur (`responded_existence` constraint).
* If "Send Purchase Order" occurs, then "Receive Goods" must occur in the future (`response` constraint).
* If "Create Invoice