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Change variable names in example #137

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Merged
CZDanol merged 2 commits into from
Apr 24, 2026
Merged

Change variable names in example #137

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5bad84c
Revise NFC Data Format Specification
ljanecek Apr 23, 2026
38931d5
Fix naming in documentation
ljanecek Apr 24, 2026
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14 changes: 7 additions & 7 deletions docs_src/nfc_data_format.md
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Original file line number Diff line number Diff line change
Expand Up @@ -120,7 +120,7 @@ UUIDs are derived from the brand-specific IDs using UUIDv5 with the `SHA1` hash,
1. NFC tag UID is represented as a bytestream with the MSB being the first byte in the bytestream.
* **Important:** Various apps/readers report these UIDs in various byte orders, and sometimes as hex strings instead of bytestreams. For NFCV, the UID MUST be a 8 bytes long bytestream with `0xE0` as the **first** byte (SLIX2 then follows with `0x04, 0x01`).

| UID | Derviation formula | Namespace (`N`) |
| UUID | Derviation formula | Namespace (`N`) |
| --- | --- | --- |
| `brand_uuid` | `N + brand_name` | `5269dfb7-1559-440a-85be-aba5f3eff2d2` |
| `material_uuid` | `N + brand_uuid + material_name` | `616fc86d-7d99-4953-96c7-46d2836b9be9` |
Expand All @@ -145,15 +145,15 @@ material_name = "PLA Prusa Galaxy Black"
material_uuid = generate_uuid(material_namespace, brand_uuid.bytes, material_name.encode("utf-8"))
print(f"material_uuid = {material_uuid}")

material_package_namespace = "6f7d485e-db8d-4979-904e-a231cd6602b2"
package_namespace = "6f7d485e-db8d-4979-904e-a231cd6602b2"
gtin = "1234"
material_package_uuid = generate_uuid(material_package_namespace, brand_uuid.bytes, gtin.encode("utf-8"))
print(f"material_package_uuid = {material_package_uuid}")
package_uuid = generate_uuid(package_namespace, brand_uuid.bytes, gtin.encode("utf-8"))
print(f"package_uuid = {package_uuid}")

material_package_instance_namespace = "31062f81-b5bd-4f86-a5f8-46367e841508"
instance_namespace = "31062f81-b5bd-4f86-a5f8-46367e841508"
nfc_tag_uid = b"\xE0\x04\x01\x08\x66\x2F\x6F\xBC"
material_package_instance_uuid = generate_uuid(material_package_instance_namespace, nfc_tag_uid)
print(f"material_package_instance_uuid = {material_package_instance_uuid}")
instance_uuid = generate_uuid(instance_namespace, nfc_tag_uid)
print(f"instance_uuid = {instance_uuid}")
{% endpython %}

## 4. Meta section
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