KBL remains common in automotive harness programs, while VEC provides a broader and more expressive model for electrical-system and harness information. Converting a file is easy to describe and difficult to do honestly: real exports contain version differences, customer extensions, tool-specific conventions, incomplete references, and data that has no exact target equivalent.
KBL and VEC do not express the same scope
KBL is centered on the physical harness description. VEC can represent a wider system of parts, specifications, connectivity, requirements, and lifecycle information. A KBL-to-VEC conversion can preserve the KBL scope, but it cannot invent the richer product knowledge that was never present in the source.
| Engineering area | Conversion concern | Required evidence |
|---|---|---|
| Identity | IDs may be locally unique, generated, or reused across documents | Stable target identity plus source identifier provenance |
| Components | Part references and role-specific occurrences may be modeled differently | Resolved occurrence-to-specification mapping |
| Protections | A broad source type may map to several more specific target concepts | Declared mapping rule and any inference used |
| Routing | Segments, topology, placement, and wire paths can carry different assumptions | Connectivity and route validation after mapping |
| Variants | Configuration expressions may not align one-to-one | Selected scope and unresolved effectivity conditions |
| Extensions | OEM or tool-specific properties may have no standard destination | Extension inventory and preservation policy |
Use a neutral model as the conversion boundary
Direct field-to-field translation tends to spread format assumptions through the converter. A neutral harness model provides a better boundary: import the source into explicit engineering entities, validate the relationships, then export using a target-specific contract. This separates source recovery from target serialization and makes information loss easier to see.
The neutral model must be more than a lowest-common-denominator schema. It needs to represent connectors, cavities, terminals, seals, wires, splices, routed segments, protections, fixings, configurations, and provenance while allowing source-specific evidence to survive alongside normalized values.
Every export should be able to say which entities were preserved, normalized, derived, omitted, or require validation in the receiving tool.
A production conversion workflow
- Identify the exact source dialect. Record the KBL or VEC version, namespaces, extensions, producing system, and program-specific conventions.
- Resolve references before mapping. Broken IDs and dangling relationships are source-quality findings, not target-format problems.
- Normalize into engineering entities. Preserve original identifiers and raw properties alongside normalized concepts.
- Validate the neutral harness. Check topology, cavity usage, conductor endpoints, routing continuity, material assignments, and configuration scope.
- Apply a versioned target contract. Make target requirements, unsupported features, naming rules, and extension handling explicit.
- Re-import or validate downstream. A syntactically valid XML document is not proof that the receiving engineering system interprets it correctly.
What a conversion report should contain
- Source and target standard versions, namespaces, and producing application.
- Counts of imported, exported, inferred, omitted, and unresolved entities by type.
- Reference-resolution, topology, connectivity, and configuration findings.
- Every use of a default, fallback, lossy mapping, or customer-specific rule.
- The target-system validation that remains required before release.
Harness Studio imports KBL and VEC into an inspectable neutral model, supports repair and validation before export, and keeps readiness evidence visible through the workflow. That makes the conversion reviewable by a DRE instead of treating XML generation as the finish line.