Ktbs

IMPORTANT: this is the LAST release for Python2.
kTBS is migrating to Python3 (at last) with to plan to maintain compatibility with
Python2 in future versions.

* for users
* transformation methods
+ new iSPARQL (incremental SPARQL) builtin method
+ new H-Rules builtin method
+ new composite (pipe, parallel) builtin methods
+ the filter method now takes subtypes into account
+ improved FSA method
* REST API
+ now a single obsel can be removed with a DELETE request on its URI
* Other features
+ improved documentation
+ various optimizations

* for admins
* improved Gereco console
* improved profiler plugin
* bin/ktbs now can serve parallel requests (using the package 'waitress')
* the sparql_endpoints plugin now also supports SPARUL
* added experimental background daemon to force computed traces to upadte
* 5xx errors can now contain a traceback (send-traceback config opt)

* for developers
* migrated tests from Node (deprecated) to PyTest and Tox
* made it easier to write builtin mehods
* improved example/stress tool

* for users
* changes of semantics
+ now a Base can contain other Bases
+ monotonicity is now based on a total order on obsels (based on: end, begin, URI)
+ hasSubject is now optional, and supports URIs as well as literals
+ AttributeTypes and RelationTypes can now have multiple domains/range
* new features
+ method based on Finite State Automata
+ geojson serializer (experimental)
+ new class DataGraph, and trace property hasContext
+ trace statistics available as ./stats in every new trace
* improved features
+ now support special origin "now" when creating StoredTrace
+ extensible HTML view through x-gereco/* mimetype, with a plugin for obsel tables
+ empty StoredTrace by DELETEing its obsel collection
+ SPARQL can now query multiple graphs (experimental)
+ Bases can now provide additional information about their items
* other changes
+ improved documentation
+ numerous bug fixes and optimizations

* for developpers
* ktbs.method.abstract makes it easier to write new methods

* for admins
* method 'external' is now a plugin (consider the security issues before enabling it)
* new plugin for profiling performances (and tool for visualizing profile data)
* added tutorial for using Virtuoso as a back-end
* script bin/ktbs-add-stats can be used to add stats to all existing traces

* for users
* improved HTML console
* SPARQL endpoints now support content-negociation (includes CSV)
* SPARQL endpoints ans SPARQL method can now access multiple graphs (full_dataset option)
* new CSV serializer for obsel lists (still beta)
* ETags now exposed on CORS, allowing PUT queries <issue 20>
* now supports the JQuery hack for overriding cache (using ?_=xxxxx) in AJAX queries
* <obsels?quick> now must be <obsels?refresh=no>,
see https://github.com/ktbs/ktbs/blob/d471528098e8d3fb5ccf1f617b35b158d26e44d3/lib/ktbs/api/trace.pyL110
for more documentation

* for developpers
* refactored rdfrest to align terminology with the SALAD paper

* for admins
* IMPORTANT: CORS support and SPARQL endpoint support are now plugins;
you MUST change your configuration accordingly
* better Install documentation

* for developpers
* JSON is now the default format (using JSON-LD to map to RDF)
* full support for CORS
* all resources now partially support the SPARQL protocol
* tutorials improved

* for admins
* authentication+authorization support (via Apache or plugin)
* centralized configuration in config file
* install tutorial available
* administration tools (ktbs-infos, ktbs-rebase)

* performance improvements
* now support multi-threading
* various bugfixes improving performance

* methods for computed traces
* implemented SPARQL method
* Filter method now can filter on Obsel types

* new features for collecting obsels
* support multiple obsels in a single POST
* support obsel creation via GET (via a plugin)
* support Cross Origin Resource Servicve (http://www.w3.org/TR/cors/)

* HTML serializer
* code is now more modular
* obsels are now displayed in chronological order

* various bug fixes