Is there an industry standard for the maximum number of digits used in the track number field?
I have recently found myself using MP3 Tag to add metadata to files for a daily TV show/podcast that I listen to. The content creator did not fill in the "Track" field, but I like to use that field to get the files to sort chronologically. I have been using the episode date for a track number, eg, 2014 March 5 becomes 140305. Yesterday I discovered that my portable mp3 player only reads the last three digits of that number, but Windows Media Player reads all six digits and sorts the file correctly.
I have been wanting to contact the ministry that produces this content and talk to them about proper mp3 tagging for the benefit of those of us who download the files and play them on various devices. Given my recent experience, I'm wondering what track numbering convention to recommend. Is three digits considered the industry standard or is my mp3 player a little odd, or perhaps old?
I realize this isn't a MP3 Tag specific inquiry, but perhaps the answer will help others, especially those who may be using the software to tag files for a daily podcast.