What is a characteristic of BIM proprietary file formats?

BIM proprietary file formats are indeed specific to certain software applications. This means that these file formats are designed for use with particular BIM software and often contain features or data structures optimized for that specific platform. As a result, they may not be fully compatible with other software, which can limit their usability in a multi-software environment.

When working with proprietary formats, users typically rely on the recommended software to access, edit, and utilize the data stored within these files. This characteristic allows for advanced functionality but also creates challenges for interoperability and sharing information across different systems. Other options, while mentioning aspects of file sharing and accessibility, do not accurately reflect the nature of proprietary formats since they are not open for public use, may not always require conversion, and can present challenges when it comes to sharing among users who do not have the same software.