What are tags?
Tags are like keywords or labels that you add to a photo to make it easier to find later. You can tag a photo with phrases like "catherine yosemite hiking mountain trail." Later if you look for pictures of Yosemite, you can just click that tag and get all photos that have been tagged that way.
You may also have the right to add tags to your friends' photos, if your friends set that option in the privacy settings for their photos.
Here's a list of the 150 most popular tags.
One of our members, Striatic, has posted some great tips on the FlickrCentral discussion board.
Is there a limit on the number of tags I can add to a photo?
Yes. It's 75 tags per photo.
If you want to add new tags to a photo that has more than 75 tags, you'll need to get the number of tags under that limit first.
Why aren't my photos appearing in searches or groups?
If your account is new, first you need to upload at least 5 public photos. After that minimum has been reached, then it shouldn't take more than a few days until your photos appear in searches, groups, etc. To make sure your photos show in searches, remember to add accurate tags and descriptions.
If your account is not new and some of your images are not showing, here are a few things you can check,
- What is the safety setting? Items marked as moderate or restricted will not show in badges, RSS feeds, for people that have safe search on, or are not logged in.
- Is your account hidden from search?
- If only some photos aren't showing, make sure they are not flagged to be hidden from searches.
I've tagged my photos and videos, why can't I see them on a tags page?
There are a variety of reasons why your items might not be showing up, but in most instances the issue should resolve itself within 24 - 48 hours.
Can I tell who's tagged another member's content?
Prior to 12/02/08, this information wasn't surfaced on Flickr, but was available through our API. After this date, mouse over the tag and tool tip will display the name of the member who added this information.
What are machine tags?
First and most importantly, machine tags are for humans too! A machine tag is just like a normal tag that you a human (hopefully), write in a special format. When a machine (like another server or website) reads it, it can automatically perform a special action.
An example is upcoming.org. If you are attending this event listed on Upcoming, all you have to do is add the tag "upcoming:event=428084" to the picture and it will automatically show on the Upcoming event page. Upcoming's servers look for tags with "upcoming:". If it says "event" they know to use it on an event page. Then you tell them which event by adding the number at the end.
Machine tags always have 3 parts just like the Upcoming example.
- a namespace, i.e. upcoming [who is going to care about this tag]
- a predicate, i.e. event [what does this apply to]
- a value, i.e. 123456 [which one is this]
To see this in another example, you can record location information by entering latitude and longitude as geo:lat=12.345678 & geo:lon=12.345678
Some other places are using them already like last.fm. But even if you find something they are not being used for, you can just start writing them in! That's the beauty of a machine tag. Maybe you and your horticulture friends start tagging plants (i.e flora:tree=coniferous) or you want a way to categorize art in the pictures you see (i.e. medium:paint=oil). You can just write it like a normal tag and after the data is there, it's available to mix up when someone tells a machine to go fetch it.
Note: Namespaces and predicates must begin with a character between a - z; remaining characters may be a - z, 0 - 9, and underscores. Namespaces and predicates are case-insensitive.