ChangeLog for TDB
=================

==== TDB 1.0.1

+ JENA-550 : tdbloader2 now checks that the target location either 
  does not exist or does not contain database files. 


==== TDB 1.0.0

This was also know as TDB 0.10.2 

==== TDB 0.10.1

+ JENA-426 : Default statistics gathering now collects information on rdf:type usage.
  Large databases, with small numbers of different classes, may benefit from recalculating stats.opt.   

==== TDB 0.10.0

** TDB 0.10.0 depends on Jena 2.10.0 (ARQ 2.10.0)

+ Improve the performance of union default graph by efficiently handling potential duplicates.  
+ Command line tdbquery: --mem (or --data) reads into an in-memory dadaset and executes the query.
+ JENA-289 : QueryExecution timeouts now cause TDB BGPs to timeout even if they produce no output. 
+ JENA-363 : Fix to handling of integers with absolute values between 2^56 and 2^63.  
+ JENA-346 : Further fixes for default union graph + write transactions.
+ Consolidation of versions numbers.
+ JENA-344 : Union default graph now works for SPARQL Update WHERE clauses. 

==== TDB 0.9.4

+ Enable batching of flushing commits to the main database - 
  This improves transactional write performance.
+ Extensive testing and fixing for recovery due to abrupt termination of the JVM.  
+ JENA-318 : Fix rejection of bad language tags.
+ JENA_317 : Fix to handling decimal numbers.  Decimals of around 15 digits could be corrupted.  
+ JENA-301 : Recovery did not reset internal file state under certain conditions.  
+ Bug fix: out-of-range derived integers (e.g. xsd:int)
+ Cache read transaction datastructures and reuse view when possible.
+ Add StoreConnection flush() operation to push delayed writer-commits if possible.    
+ JENA-290 : TDB txn creation touched stats unnecessarily, causing slow down. 

==== TDB 0.9.3

+ Batching of writer-commits to improve write transaction performance.

==== TDB 0.9.2

+ Bug fix (for use in Fuseki).  Caused excessive, if harmless log messages.

==== TDB 0.9.1

+ (JENA-252) Fix multithreaded interaction transitioning to transactional mode
+ (JENA-250) Fix lack of sync transitioning to transactional mode
+ Added tdbloader3 (i.e. a pure Java version of tdbloader2) (JENA-117)
+ Bug fix: Graph.size() reports '0' for TDB "urn:x-arq:UnionGraph" (JENA-222) 	
+ Bug fix: Illegal UTF-8 could corrupt the node table. Use binary-safe encoder/decoder (JENA-225)
+ Bug fix: (JENA-230)

==== TDB 0.9.0

TDB 0.9.0 introduces ACID transactions for TDB.  This is based on write-ahead logging.

+ Transactions and transactional datasets.
  http://jena.apache.org/documentation/tdb/tdb_transactions.html
+ Maven group id is now "org.apache.jena" and artifact name is "jena-tdb". 
+ Java 6 is required to run TDB.