feat: add rdfs as a format supported as text

assigned to @Florent.Poittevin

added 4 commits

• 46db9adf...879a0150 - 3 commits from branch master
• 3949dd5c - feat: add rdfs as a format supported as text

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added 2 commits

• b00e74ef - 1 commit from branch master
• 097991fb - feat: add rdfs as a format supported as text

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merged