1 url : field=url hash boolean=Q unique=Q
2 title : weight=3 index truncate=80 field=caption boolean=S
4 author : field=author boolean=A
5 language : field=language boolean=L
6 headers : weight=2 index field=sample
7 lastmod : field=lastmod value=1
8 md5 : field=md5 value=2
9 size : field=size value=3
10 content : index field=sample