https://www.prexfo.com/en/Recent content on PrexfoHugo -- gohugo.ioenhttps://www.prexfo.com/en/docs/format/ordnerstruktur/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/format/ordnerstruktur/PropertyExchangeFolder — the folder structure # The central idea: the folder structure is the data model. No system of artificial database IDs, but a speaking hierarchy in which the location of a file already says what it refers to. Documents are filed as high as necessary, as precise as possible. The tree # ROOT/ ├── PROPERTIES/ │ └── <property-slug>/ ANCHOR: parcel number │ ├── masterdata.xml │ ├── <documents>.pdf │ └── BUILDINGS/ │ └── <building-slug>/ ANCHOR: coordinates │ ├── masterdata.https://www.prexfo.com/en/docs/format/xml-schema/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/format/xml-schema/PropertyExchangeFormat — the XML schema # The XML schema defines the DNA of the structured data in Prexfo. It is designed for longevity, flexibility and clarity — not for completeness at any cost. Key facts # Property Value Namespace https://prexfo.org/schema/v1 Version 1.0.0 Encoding UTF-8 Validation XSD 1.0 License Apache 2.0 Structure # The core schema prexfo-core.xsd references reusable base types and entity schemas: schemas/ ├── prexfo-core.xsd # main schema ├── types/ │ ├── common-types.https://www.prexfo.com/en/docs/idee/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/idee/The idea behind Prexfo # Prexfo is more than a technical format. It is a deliberate choice against the prevailing trend of moving data into central, API-driven platforms — and for the owner’s control over their most valuable digital asset. Three pillars carry this idea. Pillar 1 — Data sovereignty # In the classic world, truth lives in a vendor’s database. Whoever switches vendors loses data, history and negotiating power.https://www.prexfo.com/en/docs/format/pdf-container/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/format/pdf-container/The PDF/A-3 container — following the ZUGFeRD model # A structured record is of little use if no human can read it any more — and a pretty PDF is of no use to a machine. Prexfo solves this like the successful electronic invoice ZUGFeRD: both live in one file. The principle # A PDF/A-3 document shows the content to the human in the usual form. Embedded in the same document is the machine-readable prexfo.https://www.prexfo.com/en/docs/nutzen/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/nutzen/Value for everyone involved # A standard only prevails if every group in the ecosystem sees a clear benefit. Prexfo is tailored so that a concrete pain point disappears for each of them. For property managers # Absolute control over your own data. No longer tied to a monolithic piece of software: the data lives in an open, portable format, and the choice of tools is free. Standardized exports for banks or insurers turn from a tedious chore into a value-adding service.https://www.prexfo.com/en/docs/vergleich/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/vergleich/Prexfo in comparison # Data standards already exist in the real estate industry. Each serves a niche — and leaves exactly the gap that Prexfo fills. The existing landscape # OpenImmo is the de-facto standard for marketing data in Germany. Its strength — the focus on sale and rental — is at the same time its limit: the operational lifecycle (management, maintenance, finances) does not appear. IBPDI is the most ambitious counter-design: a global “common data model” for everything.https://www.prexfo.com/en/docs/datenschutz-by-design/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/datenschutz-by-design/Privacy by design # An immutable, append-only data model and the GDPR “right to erasure” seem to contradict each other. Prexfo resolves this contradiction elegantly in technical terms — and makes privacy a built-in feature, not a retrofit. The challenge # Article 17 GDPR gives data subjects the right to demand erasure of their personal data. A system that by design deletes nothing physically appears incompatible with this at first.https://www.prexfo.com/en/docs/werkzeuge/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/werkzeuge/Tools # A standard without good tools does not prevail. Because Prexfo relies on file-based exchange rather than a central API, the quality of the SDK decides its acceptance among developers. The workflow engine # The heart follows the UNIX philosophy: tools do one thing well, workflows orchestrate them, the engine runs workflows. Each tool is a standalone program — language does not matter (Python, Bash, Go …). A document goes in (argument), the result comes out (stdout/files).https://www.prexfo.com/en/docs/praxis/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/praxis/Practice at Berlus # Prexfo is neither a whitepaper nor a drawing-board design. The standard emerges where it has to prove itself: in the running operation of the Berlus property management. What works here goes into the standard — what does not gets discarded. The data mirror # 106properties in the format 752units with master-data XML 178,586documents captured 100%full-text searchable The entire document stock lives in the PropertyExchangeFolder — from the operating-cost statement through inspection reports and contracts to correspondence.https://www.prexfo.com/en/docs/roadmap/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/roadmap/Roadmap & governance # Technical excellence alone does not make a standard. A standard needs trust, a community and a credible path to formal recognition. Here is the plan. Governance — who owns the standard # Prexfo is meant to belong to no one alone. The recommended model is “liberal contribution”: influence arises from current work, decisions are reached by consensus. The standard is carried by a non-profit consortium (in Germany a registered association) acting as a neutral steward.https://www.prexfo.com/en/docs/kontakt/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/kontakt/Contact # You want to use Prexfo in your own operation, contribute as a design partner or help shape the standard? We talk directly and without detours — technically on eye level. Berlus GmbH # Müllerstraße 115a 13349 Berlin Germany Phone: +49 30 89 78 44 77 Fax: +49 30 89 78 44 79 E-mail: wehrheim@berlus.de Web: www.hausverwaltung.de Contact: Wolfgang Wehrheim (Managing Director) What we are looking for right now.https://www.prexfo.com/en/docs/impressum/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/impressum/Legal notice # Information pursuant to § 5 TMG (German Telemedia Act) Berlus GmbH Müllerstraße 115a 13349 Berlin Germany Represented by: Managing Director Wolfgang Wehrheim Contact: Phone: +49 30 89 78 44 77 Fax: +49 30 89 78 44 79 E-mail: wehrheim@berlus.de Register entry: Local Court Berlin-Charlottenburg, HRB 107091B About the Prexfo brand # Prexfo (PropertyExchangeFormat / PropertyExchangeFolder) is a standardization initiative of Berlus GmbH. Specification and SDK are published under the Apache 2.https://www.prexfo.com/en/docs/datenschutz/Mon, 01 Jan 0001 00:00:00 +0000https://www.prexfo.com/en/docs/datenschutz/Privacy # The protection of your data matters to us. This website is a technical draft and serves to present the Prexfo standard. Controller # Berlus GmbH Müllerstraße 115a 13349 Berlin E-mail: wehrheim@berlus.de Data processing when visiting # This website is designed as a static site and embeds no external trackers, no advertising networks and no third-party analytics tool. When you access it, only the technically necessary server access data are processed, as they arise in the operation of any website (IP address, timestamp, page requested) — to deliver the page and to ensure technical security.