using Sitecore I have created a data template
Person Gender
Text : Single Line Text
Key : Number
Then I created 2 new instances of this template in Global content tree:
Global/Gender
Text = Male
Key =0
Text = Female
Key=1
After all I've created a new Data Template, called: Person
Person
Name : Single Line
Gender: DropLink (Source: /sitecore/content/home/global/gender/*)
But in instances of Person, DropLink field dosen't show me Female and Male items to select.