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Changelog History
Page 1

  • v0.7.7

    October 15, 2019

    ๐Ÿš€ This patch release fixes a bug shipped in v0.7.6 that assets deprecation warning pops up even though the assets flag is not provided.

  • v0.7.6

    October 14, 2019

    ๐Ÿš€ The long anticipated release brings a lot of bug fixes and some performance improvements, especially for KV backends.



    • ๐Ÿ†• New SQLite backend (#751).
    • KV and NoSQL backends migrated to Hidalgo.
    • ๐ŸŽ‰ Initial import to KV backends should be much faster now (#803).

    Query languages

    • A new Order() iterator and corresponding method for Gizmo (#796).
    • Set of changes to Gizmo to make it more Gremlin-compatible (#822, #849, #859).
    • Gizmo can now emit JSON-LD via HTTP API if appropriate Accept header is set (#821).

    ๐Ÿ› Bug fixes

    • ๐Ÿ‘€ A lot of bug fixes for queries, backends, etc. See the full changelog for details.

    Go library

    • Switched to Go modules.
    • ๐Ÿ“ฆ Quads package split to it's own repository.

    ๐Ÿ’ฅ Breaking changes

    • The query.Session interface changed to be more user-friendly.

    Note: Cayley haven't reached 1.0 yet, thus you should pin a specific version in go.mod to avoid breaking changes. We try hard to minimize those.

  • v0.7.5

    November 26, 2018

    ๐Ÿš€ This release brings multiple stability fixes and adds initial support for cyclic objects to the schema lib.


    ๐Ÿ›  Fixes

    • ๐Ÿ›  Fix bug when deleted a reinserted quad in KV backends (@3pCode, #747).
    • ๐Ÿ›  Fix Optional iterator not propagating own tags (@phyrwork, #739).
    • โšก๏ธ Update BoomFilter to avoid panic (@hypirion, #744).


    • ๐Ÿ‘ schema: Support loading and writing objects containing loops (#745, #746).
    • schema: Fix recursive ID lookup in anonymous fields (@phyrwork, #733).
    • ๐Ÿ†• New Resolver iterator (@phyrwork, #741).
    • โž• Add RefsOf to BatchQuadStore interface (@phyrwork, #742).

    ๐Ÿ“Œ As always, we expect Go users to pin a specific Cayley version tag with dep.

    Changelog on Github dennwc: iterator: do not drop an error in resolver phyrwork: Implement Resolver iterator โœ… HaraldNordgren: Bump Go versions and use '.x' to always get latest minor versions โšก๏ธ 3pCode: update test to check all return codes, update variable name. โšก๏ธ 3pCode: Update authors and contributors 3pCode: Fix bug when deleted a reinserted quad. cristaloleg: Use type-switch ๐Ÿ‘ dennwc: schema: support loading objects with loops ๐Ÿ“ฆ dennwc: schema: split schema package into multiple files phyrwork: Add RefsOf to the BatchQuadStore interface ๐Ÿ‘ dennwc: schema: support writing structs that contain loops; fix #731 ๐Ÿคก phyrwork: Fix mock store ValueOf implementation never returning nil โšก๏ธ hypirion: Update dependency revision on BoomFilters phyrwork: Fix Optional iterator not propagating own tags โœ… s_guozhuming: run tests for a specific backend implementations s_guozhuming: pull image from remote repository if there is not image at local machine barakmich: change order of dep grabbing โšก๏ธ barakmich: Update pouchdb version โšก๏ธ barakmich: fix goja dep, update travis lynic: Correct db name using mongo backend (#723) ๐Ÿ›  phyrwork: Fix Config.idFor() recursive ID lookup in anonymous fields (fixes #732) tooolbox: Begin the Glossary (#728) jtorvald: Added unsigned integer types (#725)

    Special thanks goes to @phyrwork and @3pCode for their contributions.

  • v0.7.4

    June 03, 2018

    ๐Ÿš€ This release fixes few bugs and adds label support for the schema lib.


    • Schema lib now allows adding a label to all written quads (1a0c7cb)
    • ๐Ÿ›  Fixed a bug with KV backend that allowed to write duplicate quads in the same TX (#675)
    • All() query for nodes now honors a query limit (#718). Previous behavior can be achieved by passing ?limit=-1 parameter.

    ๐Ÿ“Œ As always, we expect Go users to pin a specific Cayley version tag with dep.

    Changelog on Github โšก๏ธ dennwc: graphql: update dependency and test filter with multiple values dennwc: schema: allow to specify quads label on write ๐Ÿ›  dennwc: bolt: do not insert duplicate quads found in the same tx; fixes #675 โœ… dennwc: set a correct limit in integration tests dennwc: cli: assume stdout as an output when no arguments are specified ๐Ÿ›  dennwc: gizmo: All should honor a query limit; fixes #718 โšก๏ธ robfig: cayley-single.yml: update version tag to latest

  • v0.7.4-2

    June 03, 2018

    ๐Ÿš€ This release fixes few bugs and adds label support for the schema lib.


    • Schema lib now allows adding a label to all written quads (1a0c7cb)
    • ๐Ÿ›  Fixed a bug with KV backend that allowed to write duplicate quads in the same TX (#675)
    • All() query for nodes now honors a query limit (#718). Previous behavior can be achieved by passing ?limit=-1 parameter.

    ๐Ÿ“Œ As always, we expect Go users to pin a specific Cayley version tag with dep.

    Changelog on Github โšก๏ธ dennwc: graphql: update dependency and test filter with multiple values dennwc: schema: allow to specify quads label on write ๐Ÿ›  dennwc: bolt: do not insert duplicate quads found in the same tx; fixes #675 โœ… dennwc: set a correct limit in integration tests dennwc: cli: assume stdout as an output when no arguments are specified ๐Ÿ›  dennwc: gizmo: All should honor a query limit; fixes #718 โšก๏ธ robfig: cayley-single.yml: update version tag to latest

  • v0.7.3

    April 23, 2018

    ๐Ÿš€ This release brings Elasticsearch v6.x support, a transition to dep and few bug fixes.


    • ๐Ÿ‘ Cayley now supports ElasticSearch v6.x (#711)
    • SaveOptional is exposed in Gizmo (#702)
    • Transition to dep for dependency management (#704, #703)
    • ๐Ÿ› Bug fixes (#710, #709, #708, #707)

    ๐Ÿ“Œ As always, we expect Go users to pin a specific Cayley version tag with dep.

    Changelog on Github ๐Ÿ›  dennwc: quad: do not un-quote strings in StringToValue; fixes #710 dennwc: add CODEOWNERS ๐Ÿ‘ dennwc: elastic: support v6; fix #711 skydan: Fix dep ensure and downloading with "follow redirects" option mguentner: hello_bolt: replace TempFile with TempDir mguentner: hello_schema: replace TempFile with TempDir dennwc: gizmo: expose SaveOptional; resolves #702 ๐Ÿ— dennwc: build and test for go 1.10 dennwc: switch from glide to dep glaslos: replace badge png with scaling svg

  • v0.7.2

    March 05, 2018

    ๐Ÿš€ This minor release brings few bug fixes, faster CockroachDB backend, configurable schema package and new GraphQL features.

    ๐Ÿš€ It will be the last feature release before switching to v0.8 branch. Only bug fixes will be backported to v0.7 moving forward.


    • Faster CockroachDB transactions (@dsymonds).
    • ๐Ÿ‘Œ Support for un-nesting objects and expand-all for GraphQL (#686, #692).
    • ๐Ÿ”ง Configurable schema package (#694).
    • ๐Ÿ›  Fixes for json-ld, graphviz data formats (@jtorvald).
    • ๐Ÿ›  Fixes for Recursive iterator and optimization of And.

    ๐Ÿ“Œ As always, we expect Go users to pin a specific Cayley version tag with a dependency manager.

    ๐Ÿ”„ Changelog

    dennwc: schema: allow to customize behavior; resolves #694
    dennwc: graphql: support un-nesting objects into parent; resolves #686
    dsymonds: Switch CockroachDB driver from lib/pq to jackc/pgx.
    dennwc: graphql: support expand all; resolves #692
    dennwc: properly close sub-iterator in recursive; fix #693
    dsymonds: Rewrite CockroachDB SQL construction to be much faster.
    dsymonds: Bump cockroachdb Docker tag for testing to the latest version, v1.1.5.
    dennwc: iterator: do not add empty iterator to And on failed optimization
    jtorvald: jsonld: added a DocumentLoader to NewReaderFromMap; fix NPE (#689)
    dennwc: dot: correctly escape slashes; additional file extension
  • v0.7.1

    January 30, 2018

    ๐Ÿš€ This minor release brings multiple bug fixes, query performance improvements, wildcards query and new CouchDB backend support.

    ๐Ÿš€ As noted in v0.7.0 release, support for legacy bolt1, leveldb1, mongo1 backends was dropped. New backend implementation are still available under bolt, leveldb and mongo names.


    • ๐Ÿ‘ CouchDB support (@elliott5)
    • ๐Ÿ‘ PouchDB support via GopherJS (@elliott5)
    • ๐Ÿ‘Œ Support for wildcard queries (#676)
    • ๐Ÿ›  Multiple fixes for FollowRecursive (@jtorvald)
    • ๐Ÿ‘ Better location of UI assets (@gauravtiwari)
    • KV and SQL backends will now track node ref counters properly.
    • ๐ŸŽ Various fixes and performance improvements (1f53d04, 463642e, 2d6d563; thx to @jtorvald)

    ๐Ÿ“Œ As always, we expect Go users to pin a specific Cayley version tag with a dependency manager.

    ๐Ÿ”„ Changelog

    dennwc: nosql: iterator size should not be negative in case of error
    dennwc: dock: expose container port on darwin properly
    dennwc: nosql: if store has only 32 bits, store a copy of int field
    dennwc: graphtest: test max int roundtrips and comparisons
    elliott5: ouch: new couchdb/pouchdb backend
    dennwc: cli: fix database close on init
    dennwc: iterator: correctly limit depth for recursive; fix #685
    dennwc: gizmo: always initialize context; fixes #674
    dennwc: graph: unwrap implementation to enable optional interfaces
    dennwc: sql: copy tags when cloning an iterator
    dennwc: allow to specify quad file address for non-persistent backends; fix #677
    dennwc: iterator: correctly clone error iterator and make a distinct type for it
    dennwc: gizmo: clarify Count docs
    jtorvald: All negative values should result in unlimited depth (#679)
    jtorvald: Javascript error from sigma was not visible
    dennwc: path: test comparisons with wildcards
    dennwc: nosql: support regexp and wildcards
    dennwc: sql: do better job optimizing filters
    dennwc: sql: optimize regular expressions
    dennwc: shape,gizmo: support wildcard value filter
    dennwc: iterator: get some rough size estimates for comparisons
    dennwc: iterator: calculate real size for LinksTo(Fixed)
    dennwc: all: add benchmarks
    dennwc: kv: fix typo in bloom filter init; fix #675
    dennwc: cli: allow to pass file name as argument for load and dump
    dennwc: nosql: do not process invalid deltas
    dennwc: sql: do not decrement nodes from non-existent quads; return delta errors
    dennwc: kv: fix decrement of node refs from non-existent quads
    dennwc: test all writer parameters for each backend
    dennwc: remove test flag for backends without nodes gc
    dennwc: bump version to 0.7.1 and drop legacy backends
    gauravtiwari: Adds locations for looking up static assets (#673)
  • v0.7.0

    December 24, 2017

    ๐Ÿš€ Release covers nearly 8 months of work, mostly on implementing meta-backends, new query optimizer, performance improvements and bug fixes.

    Note: From now on we plan to release point releases on regular basis to push fixes and new features faster.

    โฌ†๏ธ Storage format for backends received an upgrade bringing backward incompatible changes. Check migration guide for more details. It only affects the database format, HTTP API remains backward-compatible.

    ๐Ÿš€ This release defines new internal interfaces (meta-backends) for working with various database kinds. Currently three of them are defined: KV, NoSQL, SQL. Each of them significantly simplifies a process of implementing a new backend, as well as allows us to lower maintenance overhead by sharing most optimizations, read and write paths, etc. This also means that optimization work on one backend will be automatically applied to other backends of the same kind in the future.

    Part of this effort was an implementation of new query representation that we call "shapes". All optimizations like query rewrites and reordering are now done on a generic level, without any backend-specific code. It will allow us to save query stats, make more complex optimizations and even store query templates in the database, or split it to be executed in distributed manner by multiple backends. Since new representation can be manipulated more easily, most backends will now rewrite complex query types into their native query language (SQL, for example).


    • ๐Ÿ‘ ElasticSearch support
    • ๐Ÿ†• New query optimizer (aka query shapes)
    • ๐Ÿ†• New command line interface
    • KV meta-backend + port of Bolt and LevelDB to it
    • NoSQL meta-backend, + port of Mongo and ElasticSearch to it
    • ๐Ÿ—„ "Raw" value type is deprecated
    • ๐Ÿ”ฆ Exposed node delete API for HTTP
    • Consistent behavior for all backends on node delete
    • ๐Ÿ†• New query types in Gizmo: Labels, SaveInPredicates, SaveOutPredicates, see docs
    • ๐Ÿ‘ Has traversal now supports value filters
    • FollowRecursive can be limited to a maximal depth
    • ๐Ÿ‘ GraphQL now supports quad labels
    • โšก๏ธ SQL query optimizer improvements
    • SQL backends now has their own names: postgres, mysql, cockroach (no need to specify flavor)
    • ๐ŸŽ Significant performance improvements
    • ๐Ÿณ Smaller Docker image
    • ๐Ÿ’ป Minor UI improvements

    ๐Ÿ’ฅ Breaking changes

    • Bolt, LevelDB and Mongo backends were rewritten and database format has changed. Old implementations are still available under bolt1, leveldb1 and mongo1 names. Old backends will be removed in next minor release. c266392
    • SQL table structure has changed 31b0f48, #617
    • 0๏ธโƒฃ Cayley now ignores duplicated quads by default 9cb0eef
    • ๐Ÿ—„ Gremlin is deprecated and dropped in favor of Gizmo #519
    • Count in gizmo is now a 'final' instead of traversal and returns result #576

    ๐Ÿ’ฅ Breaking changes (Go)

    ๐Ÿ”€ As always, we expect users to pin a specific Cayley version tag with a dependency manager and sync with following changes in the code:

    • Cayley uses Go version 1.9+
    • Bolt, LevelDB and Mongo backends were rewritten and database format has changed. Old implementations are still available under old paths, but will be dropped in next minor release. Users are encouraged to update imports to kv/bolt, kv/leveldb and nosql/mongo.
    • SQL flavors moved to their own packages and needs to be imported separately (sql/postgres for example). sql backend name will be deprecated in next major release. 48e7946
    • ๐Ÿ—„ "Raw" value type (quad.Raw and quad.MakeRaw) is deprecated and replaced with a helper to preserve at least some compatibility. It's strongly recommended to switch to quad.String or IRI and quad.Make. 41bf496
    • ๐Ÿ— Iterator optimizations for backends are mostly disabled. It is recommended to build queries with new graph/shape package and run optimizations on it.
    • โœ‚ Removed unused methods from QuadStore: Horizon, FixedIterator, Type d994e2a, b63faea, #631
    • โœ‚ Removed graph.PrimaryKey type d994e2a
    • graph.Value is now type-safe e4ab526
    • โœ‚ Removed ID and Timestamp fields from graph.Delta - they will be assigned by server 524c8e2
    • ๐Ÿšš RemoveNode type changed to quad.Value to match other methods #607
    • ๐Ÿšš Quad writers produced by graph.NewWriter and NewRemover now requires Flush to be called a420e62
    • Iterator now accepts context for Next, NextPath and Contains f3e814f
    • ๐Ÿšš Describe method was removed from Iterator and replaced by String method on iterator and graph.DescribeIterator b491f41
    • Iterator type is now a string instead of enum and registration is not necessary anymore

    ๐Ÿ”„ Changelog

    dennwc: http: expose node delete api; resolves #622
    dennwc: deprecate quad.Raw type
    dennwc: code-wide cleanup
    dennwc: iterator: remove unused equality function for fixed
    dennwc: graph: remove unused horizon function
    dennwc: memstore: use correct size for all iterator
    dennwc: add context argument to iterators and kv
    dennwc: kv: track nodes reference count; fixes #617
    dennwc: sql: track nodes reference count and simplify dialects; fixes #617
    dennwc: memstore: remove nodes if all their references are gone; addresses #617
    dennwc: iterator: returns correct subiterator slice for empty And; fixes #659
    dennwc: nosql: use base64 instead of hex encoding for hashes
    dennwc: update Go version to 1.9
    dennwc: update integration test, make it a part of suite; move paths as well
    dennwc: fix tests for predicate save query; fix node tokens for bolt
    dennwc: nosql: use shapes optimizer for queries
    dennwc: shape: allow to simplify shapes; add helpers for building node filters
    dennwc: elastic: port to nosql layer; resolves #653
    dennwc: nosql: store each typed value in separate field; support batch inserts
    dennwc: separate mongo logic and define a generic nosql layer; resolves #652
    dennwc: iterator: replace Describe method with a helper
    dennwc: graphql: support @label directive; resolves #614
    dennwc: path/gizmo: support Has with filters; resolves #650
    dennwc: bolt,leveldb: swap names to a new kv backend implementations
    michaelqiu94: ElasticSearch as Supported Backend (#634)
    dennwc: path,gizmo: allow to save predicates without moving from nodes; fix #591
    dennwc: http: allow to serve API without web files; fix #503
    dennwc: ui: format json results; resolve #454
    dennwc: sql: optimize intersection, value lookup and comparison
    dennwc: sql: fix params propagation from sub-queries
    dennwc: sql: rewrite query builder to shapes; fix #563
    dennwc: shape: optimize multiple Pages; push Fixed values from Intersect into NodesFrom
    dennwc: propagate sub-iterator errors from And properly
    dennwc: stream ops in node delete; return error if node is missing; fix #608
    dennwc: add a single package that imports all supported backends
    derekrliang: Add optional max recursion depth to FollowRecursive (#639)
    derekrliang: Fix query shape error when query has no result data links (#641)
    derekrliang: Add running local unit test documentation (#640)
    dennwc: bolt,leveldb: port to kv layer
    dennwc: kv: add in-memory implementation
    dennwc: integration: open and close db for each test set; use table benchmarks
    dennwc: kv: support for index scans and indexes on multiple directions
    dennwc: kv: allow to customize indexes
    dennwc: kv: batch get requests and simplify bucket interface
    Yannic: Reduce Docker image size (#637)
    dennwc: sql: separate packages for flavors (#633)
    Yannic: Remove unused Type function (#631)
    dennwc: docs: add http api definitions (swagger v3)
    dennwc: iterator: remove duplicated TagResults code and type registration
    dennwc: github: simplify issue template header, add slack link
    dennwc: tag values in recursive iterator correctly
    dennwc: shape: new query optimizer
    dennwc: memstore: iterator optimizations
    dennwc: graph: rewrite pk; remove horizon and ts from delta; rewrite memstore
    dennwc: kv: registration, scan by prefix, support for flat kv
    dennwc: integration: allow to load data to remote backends
    dennwc: gizmo: fix #620 and bump goja version
    dennwc: graph: helper for writing quads to tx (useful for schema)
    dennwc: writer: add a direct constructor for single replication
    Jason Kingsbury: make bloom filter buffer before initialisation
    dennwc: cli: read query timeout from config file; fix #613
    dennwc: graphql: allow full IRI charset in names; resolve #616
    dennwc: schema: allow to limit depth; fix #609
    joostverdoorn: Set CORS headers on gephi stream
    dennwc: http: allow to specify query limit; fix #612
    joostverdoorn: Add labels morphism and Gizmo API (#610)
    dennwc: http: do not add .md extension if it's already present; fix #597
    dennwc: schema: return an error on write if required field is not set; fix #602
    dennwc: accept quad.Value instead of graph.Value for RemoveNode; fix #607
    dennwc: print warning on set verbosity for glog; fix #599
    dennwc: flush writer in schema example; fix #606
    harlantwood: Remove "angry highlighting" from JSON examples
    dennwc: generic kv backend based on bolt
    h4ck3rm1k3: query from stdin (#601)
    chrispassas: Fix example startup command
    dennwc: make graph.Value safe again
    h4ck3rm1k3: adding help to repl
    dennwc: schema: handle id in anonymous struct fields
    h4ck3rm1k3: Update sidebar.tmpl (#595)
    dennwc: schema: allow to load objects from path
    dennwc: cli: implement query command
    barakmich: conversion check
    h4ck3rm1k3: Update transaction.go
    dennwc: graph: batch quads automatically if caller uses single AddQuad on writer
    gkontos: gae: fix add of previously deleted quads (#580)
    MarioAriasGa: Glog issues (#579)
    barakmich: bolt2: use bloom filter to speed insertion
    barakmich: bolt2: working queries
    barakmich: graph: Add primitive proto
    barakmich: Fix glide story; ignore docker deps, `glide.lock` is now sane
    dennwc: gizmo: make Count a final instead of traversal
    dennwc: fix contains on recursive iterator
    dennwc: check for nil result from NameOf; fix #574
    dennwc: ignore duplicate quads by default
    dennwc: docs: add example configs for kubernetes; resolves #327
    dennwc: do not load test dataset in container
    dennwc: golang client for data import/export; add tests for v2 api
    dennwc: http: support queries in api v2; expose api v2 as a library
    dennwc: http: get rid of custom handler type
    dennwc: http: use optional interface to create qs for request
    dennwc: bind to localhost by default
    owulveryck: The -host option was missing the port argument
    mikaelcabot: cockroach: schema changes within transactions are restricted (#567)
    dennwc: gizmo: generate docs from Go function comments; resolve #520 (#560)
    dennwc: cli: register glog flags; make conv an alias for convert; resolve #561
    oren: Update - add MySQL and CockroachDB
    dennwc: deprecate gremlin in favor of gizmo; resolve #519
    dennwc: cli: deduplication tool for nodes with same properties
    dennwc: cayley: switch to cobra/viper cli
  • v0.6.1

    April 12, 2017

    ๐Ÿš€ This release marks community build number three. It includes all the pending features that can be merged before v0.7, which will be a major release to introduce Reification, and may cause breaking changes.

    ๐Ÿš€ The storage format was not changed for this release. Existing databases should work properly without any migration needed.

    ๐Ÿ‘ Cayley now supports multiple SQL flavors, including MySQL and CockroachDB.

    ๐ŸŽ To avoid further confusion, our Gremlin-style query language was renamed to Gizmo to emphasize that it's not fully Gremlin-compliant. We also switched to the Goja JavaScript VM for better performance and ES5.1 support. Error handling was also improved for our query language.

    ๐Ÿš€ This release introduces an experimental GraphQL implementation. Note that it only shares a similar syntax and does not support schema yet. It's a preview feature, so the implementation or API may change in following releases.

    โšก๏ธ The import and export formatter system is now modular and can be easily extended. Cayley now supports JSON-LD, Graphviz (aka DOT; export only) and custom binary formats for better import speed. The HTTP API was updated (v2) to support the new formatter system and allows for the streaming of large amounts of data in single request.

    The recursive iterator is finally available via the Go path library and Gizmo. It allows traversal of a path recursively to potentially unlimited depth.

    A new Schema library was implemented to allow developers to save and load complex Go objects with a single method call.


    • ๐Ÿ‘Œ Support for MySQL and CockroachDB.
    • Gizmo query language with faster ES5.1-complaint VM (supersedes Gremlin).
    • Experimental GraphQL-like query language.
    • Modular import/export formats system.
    • ๐Ÿ‘Œ Support for JSON-LD, Graphviz (DOT) and Cayley-specific binary format.
    • ๐ŸŽ HTTP API v2 with better import/export performance for large data files.
    • ๐Ÿ‘ Recursive iterator support (FollowRecursive).
    • Schema lib (aka ORM or Object Persistence Layer).
    • IRI prefix registration.

    Full changelog:

    dennwc: gizmo: expose recursive traversal and update docs
    dennwc: path: FollowRecursive traverses quad.Values
    barakmich: add FollowRecursive to the path lib
    barakmich: graph/iterator: Add Recursive iterator
    dennwc: graphql: close iterator properly; fixes #545
    dennwc: tests: require.NoError instead of Nil
    dennwc: gae: fix nop iterator optimization
    dennwc: sql: append WHERE only if constraints are present
    dennwc: http: CORS, API to get supported formats and RO mode fix
    dennwc: quads: add json stream format
    dennwc: mql: fix NPE
    dennwc: gephi: allow to filter quads in raw mode
    dennwc: gephi: inline primitive values automatically; inline schema:url
    dennwc: gephi: initial support for graph stream
    jtorvald: Updated documentation based on Issue #349 (#541)
    caosiyang: docs: fix a typo in (#542)
    jtorvald: Issue #286 init db and config documentation (#538)
    Yannic: graph: cleanup and more robust options handling (#536)
    dennwc: initial graphql support
    dennwc: cli: fix loading of data for non-persistent backend
    jtorvald: docs: replace broken MQL link, add quick-start cli usage example (#535)
    mikaelcabot: CockroachDB transaction retries (#534)
    dennwc: bolt: make bolt concurrent-safe as it should be
    dennwc: gizmo/gremlin: fix tags for Both traversal; fix #532
    dennwc: fix #530 and write errors as plain json
    dennwc: quad: support for graphviz format
    dennwc: memstore: close iterator properly
    dennwc: memstore: do not hash values in QuadDirection
    dennwc: memstore: no recursion in Next
    dennwc: http: use formats - implement write api v2; resolves #176
    dennwc: mongo: allow to pass full urls; fix #526
    dennwc: add missing build tags; find relative path of data files automatically
    dennwc: sql: support flavors: mysql, cockroachdb
    dennwc: mongo: remove nodes with no references; fix #517
    dennwc: gizmo: allow to register custom IRI prefixes; resolves #505
    barakmich: revert proto GetNativeValue and check for crashing nils on describe
    barakmich: Fill literal strings in MQL the same way we do results in Gremlin
    dennwc: gremlin: fix limit in ForEach; fixes #518
    barakmich: Fix non-persistent load, modernize MQL test
    barakmich: Fix -v option and debug error
    barakmich: Tidy up Optional iterator, and allow MQL to support JS-like string syntax
    dennwc: switch to goja (gizmo)
    barakmich: Fix dependencies, make Docker an optional dependency, add build tags for docker and appengine tests
    mzats: Updated examples so that they work in repl/http. (#499)
    barakmich: Remove IsNode() from the graph.Value definition.
    dennwc: schema: move well-known types package
    dennwc: graph: refactor interfaces
    dennwc: add example for schema library
    dennwc: ported schema lib
    dennwc: use vocabulary constants for value types, allow to shorten and expand IRIs
    dennwc: register known rdf vocabularies, add constants
    joostverdoorn: Add missing gojsonld dependency to glide (#502)
    dennwc: bolt/leveldb: stop complaining about existing quads even if ignore is set
    dennwc: http/repl: handle errors correctly
    dennwc: nquads: remove duplicated code
    dennwc: integrate quad formats, replace exporter, use quad helpers in tests
    dennwc: quad: readers, writers and formats.
    dennwc: Update minimal Go version
    dwhitena: Ability to pass the Mongo Backend an externally managed session. (#486)
    pbsladek: Update quickstart for 0.6.0 (#487)
    dennwc: add github issue template
    dennwc: sql: fix sqlNodeIterator size
    dennwc: fix count iterator
    dennwc: path: test both optimized and unoptimized case; few more test for gremlin
    kaneshin: Fix minor typos (#483)
    barakmich: Add arm64 support