Allowed characters for Descriptor Values

Help in understanding TS 13499
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DiVe
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Allowed characters for Descriptor Values

Post by DiVe »

DRAFT

In the specification of the ISO MME (V1.x) several descriptor values are given the attribute:
"alphanumeric"

Indeed this is not very specific. You will find (https://en.wiktionary.org/wiki/alphanumeric):
2023-10-17 12_20_44-alphanumeric - Wiktionary, the free dictionary – Mozilla Firefox.png
2023-10-17 12_20_44-alphanumeric - Wiktionary, the free dictionary – Mozilla Firefox.png (13.24 KiB) Viewed 984 times
Based on the encoding for the descriptor files of ISO 8859-1 this will enable a wide range of characters that might be used.
2023-10-17 12_29_21 ISO8859-1_encoding.png
2023-10-17 12_29_21 ISO8859-1_encoding.png (145.98 KiB) Viewed 984 times
Indeed some characters that are difficult to distinguish should be ommited.
In ISO MME V2.x the definition of the descriptor values is available in more categories:
- „string“
- „reference“
- „filereference“

And for string each character from the ISO 8859-1 is allowed:
2023-10-04 13_31_23-ISO_TS13499_RED_A_V2.1_Rev_20200218_ - PDF-XChange Editor.png
2023-10-04 13_31_23-ISO_TS13499_RED_A_V2.1_Rev_20200218_ - PDF-XChange Editor.png (18.71 KiB) Viewed 984 times

It would be helpful to provide a specific subset that is allowed or at least recommended for the exchange.
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