From Documents list page possible search values which can be typed are:

1. code="something" - find documents where url is equal to something
   
2. code="something@" - find documents where url starts with something
3. code="@something@" - find documents where url contains something
4. body="@something"@ - find documents where body contains something
5. heading="something" - find documents where heading is something
6. heading="something@" - find documents where heading starts with something
7. heading="@something" - find documents where heading contains something
8. subheading="@something" - find documents where subheading starts with something

 Not equal to search operator

1. code#"something" - find documents where url is NOT equal to something
   
2. code#"something@" - find documents where url doesn't start with something
3. code#"@something@" - find documents where url doesn't contain something
4. body#"@something"@ - find documents where body doesn't contain something
5. heading#"something" - find documents where heading is NOT equal to something
6. heading#"something@" - find documents where heading  doesn't start with something
7. heading#"@something" - find documents where heading doesn't contain something
8. subheading#"@something" - find documents where subheading  doesn't start with something

 

Using Caliban as a Jobs Database please note following will also work:

1. Heading= Job Title
2. Division= division
3. Class= class name
4. Extra 1= location
5. Extra 2= Salary
6. Extra 3= Type
7. Extra 4= Client Description
8. Reference= Reference
9. Template= Template
10. Category_1= marketing
11. Category_2= skills
12. Category_3= Category_3
13. Category_4= Category_4
14. Category_5= Category_5
15. Category_6= Category_6