Px files can contain information in more than one language. Keywords that are language dependent are repeated for each language. For example CONTENTS=“Population”; CONTENTS[sv]=“Befolkning”

Complete description of the px file format 2013 (pdf)

• Mandatory keywords
• Data in px file
• Keywords for each variable
• Keywords when a contents variable is present
• Keywords with codes or numbers
• Keywords with long texts (256 per line)
• Keywords with short texts (20 chars)
• Keywords with texts (256 or longer)
• Keywords with YES/NO option
• Recommended order