Lintian tag information: doc-base-invalid-document-field (type: error)
Description (from lintian-explain-tags)
The Document field should consist only of lowercase letters (a-z), digits (0-9), the plus sign (+), the minus sign (-) sign, or dots (.). Uppercase letters are not allowed. Please refer to Document IDs (Section 2.2) in the Debian doc-base Manual for details. Visibility: error Show-Always: no Check: menus