Preserve revisions
Import IFC exchanges from Files as immutable local revisions with filename, schema, timestamp, size, record count, and SHA-256 provenance.
Offline IFC delivery review
Ifcledger
Preserve the source. Check the data. Keep the evidence readable.
Local-firstNo account or developer-operated model service
ImmutablePreserved revisions with SHA-256 provenance
TransparentRecord evidence and explicit confidence limits
PortablePDF, text, CSV, JSON, and checksum manifest
A casebook for delivery QA
Review the information carried by an IFC exchange
Ifcledger is a focused model-review workspace, not a reduced 3D viewer. Each case keeps source revisions, requirements, findings, decisions, and exported evidence together while every result remains traceable to the parsed STEP records.
Trace relationships
Search entity classes, names, GlobalIds, and STEP IDs. Follow forward and reverse references plus resolved spatial containment.
Measure coverage
Inspect class, naming, identity, attribute, property, and quantity coverage with supporting record IDs and incomplete-row filters.
Check the contract
Run typed presence, allowed-value, and numeric-range checks. Unsupported and not-applicable outcomes stay explicit instead of becoming false passes.
Gate revisions
Compare GlobalId identities and linked semantic evidence with visible ID coverage, confidence limits, and source-linked change rows.
Triage findings
Assign an owner and due date, choose a disposition, add a local note, and retain the underlying source evidence identifiers.
Current 1.1 interface
A complete review path on iPhone
Checksummed review
Turn review state into recipient-readable evidence
Build the package on device, choose whether to include preserved IFC source bytes, then send it through Apple's share sheet. Nothing is uploaded by the developer.
- CaseManifest, context, revision provenance, and timeline
- CoverageClass and field tables with supporting records
- ContractRequirements, outcomes, and record evidence
- ReviewFinding owners, due dates, dispositions, and notes
- IntegrityText and PDF reports plus SHA-256 checksum manifest
Bounded semantic inspection
Clear evidence without pretending to certify the model
Ifcledger does not render geometry, author IFC, validate IDS files, certify schema or project compliance, detect geometric clashes, estimate cost, approve a delivery, or connect to an authoring tool, BIM server, or common data environment.
Use its source-linked evidence inside the project's approved authoring, coordination, validation, and qualified review workflow.
Standards context