Case-Sensitive IRI as spdxId

[AlexanderDenkBMW]

Hi,

using the tools-java in their 2.0.5 version I got an issue with duplicate spdxIds:

Analysis exception processing SPDX file: Object URI already exists.

Looking at the spdxIds I've notices that they are only identical if they are threaded case-insensitive. By specification the path of an URL should be case-sensitive.
This makes also sense as in fact the file exists twice in the Linux kernel includes the file twice with different content:

Simplified Examples:

https://spdx.example.com/doc-/packages/usr_lib_modules_kernel_net_netfilter_xt_hl_ko_a
https://spdx.example.com/doc-/packages/usr_lib_modules_kernel_net_netfilter_xt_HL_ko_a

In my eyes this is not an error but intended usage.

[goneall]

@AlexanderDenkBMW Agree that IRIs are case sensitive and should be treated as such by the tools.

There is a complication in fixing this issue in that the same ID structure is used for license IDs which are case insensitive. We need to be careful to still issue an error if the ID is a license ID.