How to tag a field sourcetype from the search bar?

[splunker12er]

I tried to tag the field sourcetype as suggested in the link :

[http://docs.splunk.com/Documentation/Splunk/6.1.2/SearchReference/Tags][1]

Examples
Example 1: Write tags for host and eventtype fields into tag::host and tag::eventtype.

... | tags host eventtype

---

index=* | tags sourcetype

but it doesnt created tag::sourcetype

Please help.. Am i missing something ..?

[martin_mueller]

Search for a value you want to tag, expand an event with that field value, look for the field you want to add a tag to, click the down-triangle to the right in the Actions column and select Edit Tags. That'll let you enter a tag for this field value.

After tagging you can then search by using tag=value or tag::fieldname=value.
You can edit and add more tags through the Settings as well by going into the Tags section.

See http://docs.splunk.com/Documentation/Splunk/6.1.3/Knowledge/Abouttagsandaliases for documentation on tagging your data.