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The "FileFormatDesignDoc" page has been changed by StuHood.
http://wiki.apache.org/cassandra/FileFormatDesignDoc?action=diff&rev1=38&rev2=39

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  This example adds type information and range metadata for values at level 
"name1" between 'havarti' and 'muenster': the chunk for the "name1" level 
stores a pair of tuples for the 'cheese' parent. The end result is that the 
span stores a tombstone from ('cheese', 'havarti', <empty>) to ('cheese', 
'muenster', null), where <empty> is the smallest value, and null is the largest 
value.
  
- In cases where parents are too wide to fit in a single span, range metadata 
is also used to indicate that only a portion of a parent is present in a given 
span. If a parent value in a span ends while a range is still open, then it 
will continue in further spans.
+ In cases where parents are too wide to fit in a single span, range metadata 
is also used to indicate that only a portion of a parent is present in a given 
span. If a span ends with a non-null range_end marker, then it should be 
assumed that more spans are present.
  
  === Value Metadata ===
  

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