Standards, Platforms & Data

Most good passport data does not have to be invented; it already exists somewhere in the project, and the largest single source is the BIM model. Building information modelling produces a digital model of a building in which elements carry data - a wall knows its build-up, a beam its section and grade, a window its specification. In principle, this is exactly the raw material of a passport: if the model already holds what a material is, how much there is and where it sits, then a passport can be extracted rather than researched from scratch. The ideal pipeline is 'capture once, use many times' - material data entered as part of normal design and construction, flowing out into a passport at the end.

That is the principle. The reality is more sobering, and worth stating plainly. Most BIM models are built to design and construct a building, not to document it for recovery decades later, so they are rich in geometry and coordination data but patchy in exactly the fields a passport most needs - recoverability, composition, toxicity, provenance, end-of-life pathway. A model can tell you a wall is 200mm blockwork long before it tells you whether the blocks are laid in a mortar that lets them be cleaned and reused or bonded so they can only be crushed. So while BIM is the natural home for passport data, getting a good passport out of it requires deciding, early, that the model will carry recovery-relevant data and structuring it to do so - which is an information-management decision made at the start of a project, not a report generated at the end.

There is also the problem of what happens to the model afterward. BIM models are large, software-specific and frequently archived, superseded or simply lost once a building is occupied - and a passport that depends on opening a fifteen-year-old model in software that no longer exists has failed at the one moment it was for. This is why the passport cannot simply BE the BIM model; it has to be extracted into a more durable, portable form. BIM is where the data is born and captured efficiently; it is not, on its own, where the passport can safely live for the decades until it is needed. Keeping the two ideas distinct - BIM as the capture tool, the passport as the durable record derived from it - is one of the most useful distinctions in this whole area.

If there is one concept that decides whether the whole material-passport idea works at scale, it is interoperability: the ability of different systems to exchange data and make sense of it. A passport is useless in isolation; its value comes from being read by other systems - a facilities-management system during use, a valuer's tool, a city's urban-mine map, a future recoverer's software - most of which do not yet exist and none of which is the tool that created it. For a passport to survive being read by systems its authors never imagined, the data has to be structured according to shared data standards: agreed definitions of what fields exist, what they mean, and how they are formatted, so that 'steel grade' means the same thing and sits in the same place whoever reads it.

This is why 'open standards over proprietary silos' is the central discipline of passport data. A passport held in one vendor's format, readable only by that vendor's software, is locked in - and given that the tool must outlive the software that made it, lock-in is not an inconvenience but a slow death sentence. Open, shared, well-documented standards let a passport be read, migrated and combined regardless of which tool created it or which tool reads it next. In the building world, open exchange formats and shared classification systems exist and are maturing - the same open-data thinking that lets BIM models be exchanged between different software - and the material-passport field is working toward, but has not yet reached, agreed standards for what a building passport must contain and how.

The honest state is that standardisation is unfinished. Several approaches compete; none is universal; and much passport data still moves in spreadsheets and PDFs that are readable by humans but not by machines, which defeats the purpose. The practical implication for a designer is not to wait for the perfect standard - it may be years away - but to favour open, structured, machine-readable formats over proprietary and document-based ones wherever there is a choice, and to treat interoperability as a requirement to specify, not a feature to hope for. A passport designed for interoperability from the start has a chance of surviving the fifty-year journey to the moment it is used; one designed for a single tool almost certainly will not. Keeping value in open, portable data is the passport equivalent of keeping a material at its highest value - it is what stops the record itself from becoming a dead end.

Ask 'what platform do I use to make a material passport?' and the honest answer is that there is no settled tool, but rather a spread of overlapping approaches, each capturing part of the picture. It is worth understanding these as durable categories rather than memorising products - the specific tools will come and go, but the categories, and the interoperability problem between them, will persist. This lesson names them illustratively and endorses none.

The first category is BIM-embedded data: the passport lives inside the building model as element properties, with the advantage that it sits next to the design data and can be kept in sync during a project, and the disadvantage, discussed above, that models are not durable and not always structured for recovery. The second is standalone passport platforms: dedicated tools whose whole purpose is to author, hold and serve material passports, which can be structured well for the job but raise the lock-in question - what happens to the passports if the platform disappears? The third is product and environmental-declaration databases: manufacturer data and environmental product declarations that supply much of the composition, property and provenance data a passport needs, increasingly arriving as digital product passports for individual products. The fourth is physical linking - QR codes, tags or markers on the actual material that point to an online record - which solves the crucial problem of keeping the record and the physical thing connected, so a recoverer scanning a beam on site can pull up its passport.

These categories overlap and, crucially, most do not interoperate cleanly - which is precisely the fragmentation problem. A project might have BIM data, product declarations, a passport platform and physical tags that each hold part of the truth and struggle to combine into one coherent, portable record. Choosing among them today is less about picking a winner and more about managing the seams: making sure the pieces can talk, that data is not trapped, and that the whole thing can be exported into an open format if any single tool goes away.

Because this landscape is genuinely unsettled, the durable skill is not fluency in whichever platform is fashionable this year but understanding what each category does, where each locks data in, and how to keep a passport portable across them. A designer who understands the categories can evaluate any new tool by asking the right questions - is it open, is it durable, does it keep the record tied to the thing, can I get my data out - rather than being sold a solution. Treat every product name you hear as illustrative, and the interoperability question as the one that actually matters.

It would be easy to present the pipeline - BIM to standards to platform to lifelong use - as a solved system. It is not, and an honest course says so clearly. Material passports are an emerging field. There is no single, universally agreed standard for what a building passport must contain or how it must be structured. Tools are fragmented and frequently do not interoperate. Much passport data is still entered by hand, incomplete, or lost at handover when the project team disperses. The overwhelming majority of the existing building stock has no passport at all. And the whole value of a passport lies decades in the future, which makes it perpetually easy to underinvest in today.

This matters because the gap between the polished vision and the messy reality is exactly where circular-washing creeps in. A project can commission an impressive passport, announce it, and change nothing about how the building is designed or what becomes of it - a document produced for the announcement, not for the recovery. Or a passport can be technically produced but so incomplete, so locked-in, or so quickly abandoned that it will never actually be usable. Being able to tell a passport that will work from one that is theatre is part of the literacy this lesson is building: ask whether it is open and portable, whether it is maintained, whether it is tied to the physical materials, and whether the building behind it can even be disassembled. A passport that fails those tests is paperwork, not machinery.

None of this is a reason for cynicism or delay. Emerging is not the same as worthless, and every field that becomes standard was fragmented first. The regulatory momentum behind digital product passports is real and growing, open data standards in the building world are maturing, and the argument that capture is cheap now and impossible later still holds. The rational posture is to start - to capture structured, open, machine-readable material data on the work you do now, favouring portability and interoperability, while being clear-eyed that the ecosystem to fully exploit that data is still being built. You are laying track ahead of the train, and the track only exists if someone lays it.

And hold the boundary that runs through the whole course. The passport is a data tool; it standardises and holds information. It does not certify anything, clear any material for reuse, or approve anything under the codes. Whether a documented material can lawfully and safely be reused, and on what terms it can be warranted or insured, remains a binding matter for qualified structural engineers, certified testing, the governing codes (the National Building Code of India and local regulations) and legal and insurance professionals. The best passport in the world informs those decisions superbly and makes none of them - and understanding that division is as important as understanding any standard.