Everything requires maintenance and this includes your data as your data model (of your new or existing building/estate) should be considered as an asset.
Yes, it is a model of your facility and it is only useful because it provides a model representation of the facility. But this doesn’t prevent the model from being of value and anything of value should be considered an asset.
Your physical asset: imagine you have a new building, just finished with everything working, fully commissioned and balanced, your facility is at its maximum value. Nothing has broken, nothing requires maintenance, cleaning or replacement. Over time as the facility is used, surfaces will become worn, doors will become damaged, valves will require opening and closing or they will become stuck.
It’s just the natural way that as time progresses, stuff will stop working, or will become worn out due to constant use. As more time passes and as your facility continues to be used, it will devalue. The only way to reduce this decline in value is to expend money to maintain your asset.
Your digital asset: Exactly the same process applies to your data model. The data within the model, the information about the installed assets and the design of your facility, will be correct and validated at the time that of handover or delivery of the model. This is when your model should provide a fully accurate representation of the physical (graphical) parts of your facility and the information about the parts and use of the facility.
This data will also start to devalue over time. As the parts of your facility are altered, maintained and replaced, the model representation will start to differ from the actual facility. The more the information model differs from your facility, the more the model will devalue. The only way to prevent your data model from devaluing is to invest in maintaining the data, in exactly the same way as your physical facility requires continual investment.
The data should be regularly checked for consistency and accuracy, particulary if have collected data for the anticipated life of an asset for forecasting future costs for maintaining your physical asset. As you swap or change assets, you will be required to also add new anticipated life data to correctly maintain your data. And unless you are using this data effectively, this would be a wasted activity and a devaluing asset.