---
title: "onix-codelist-253"
canonical: "https://docs.holnix.com/space/HW/388497933/onix-codelist-253"
format: markdown
---
# ONIX Code Lists Issue 67, October 2024

## List 253: Resource file feature type

| Value | Description | Notes |
| --- | --- | --- |
| 01 | File format | Resource File Feature Value carries a code from List 178 |
| 04 | Filename | Resource File Feature Value carries the filename of the supporting resource, necessary only when it is different from the last part of the path provided in <ResourceFileLink> |
| 05 | Approximate download file size in megabytes | Resource File Feature Value carries a decimal number only, suggested no more than 2 or 3 significant digits (eg 1.7, not 1.7462 or 1.75MB) |
| 06 | MD5 hash value | MD5 hash value of the resource file. <ResourceFileFeatureValue> should contain the 128-bit digest value (as 32 hexadecimal digits). Can be used as a cryptographic check on the integrity of a resource after it has been retrieved |
| 07 | Exact download file size in bytes | Resource File Feature Value carries a integer number only (eg 1831023) |
| 08 | SHA-256 hash value | SHA-256 hash value of the resource file. <ResourceFileFeatureValue> should contain the 256-bit digest value (as 64 hexadecimal digits). Can be used as a cryptographic check on the integrity of a resource after it has been retrieved |
| 31 | Audio loudness | Resource File Feature Value is the loudness in LKFS (LUFS) used for audio normalisation – see ITU-R BS.1770 |

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