Windows 7: metadata for files should be both outside of the file and inside the file

Windows Explorer in Windows XP allowed adding metadata like title, keywords, comments, etc to any file including doc, pdf and text files. The metadata added using explorer was stored in the NTFS file system as part of the attributes of the file, not in the file. There were many file types like PDF, DOC, MP3 which had attributes in the file. Windows explorer was able to read these metadata information for many file types like MS office files and audio files.

In Windows 7, Microsoft removed metadata being stored in the NTFS file system. Metadata can be stored only inside files. That means no metadata for TXT or RTF files. The viewer can't add metadata to PDF files since adobe doesn't like viewer editing PDF files.

I liked the Windows XP style.

Microsoft should provide a way for users to add additional information about a file outside of the file name and its contents.