graql | Graql : Grakn Query Language | Graph Database library

by graknlabs Java Version: 2.0.0 License: AGPL-3.0

X-Ray Key Features Code Snippets Community Discussions(7)Vulnerabilities Install Support

kandi X-RAY | graql Summary

graql is a Java library typically used in Database, Graph Database applications. graql has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has high support. However graql build file is not available. You can download it from GitHub.

Grakn is a distributed knowledge graph: a logical database to organise large and complex networks of data as one body of knowledge. Grakn provides the knowledge engineering tools for developers to easily leverage the power of Knowledge Representation and Automated Reasoning when building complex systems. Ultimately, Grakn serves as the knowledge-base foundation for intelligent systems. Graql is Grakn's reasoning and analytics query language. It provides an expressive knowledge schema language through an enhanced entity-relationship model, transactional queries that perform deductive reasoning in real-time, and analytical queries* with native distributed Pregel and MapReduce algorithms. Graql provides a strong abstraction over low-level data constructs and complex relationships. (* analytics queries are temporarily unavailable in 2.0.0). Graql is distributed as an open-source technology, while Grakn comes in two forms: Grakn Core - open-source, and Grakn Cluster - our enterprise distributed knowledge graph.

Support

Quality

Security

License

Reuse

Support

graql has a highly active ecosystem.

It has 96 star(s) with 32 fork(s). There are 12 watchers for this library.

It had no major release in the last 12 months.

There are 57 open issues and 21 have been closed. On average issues are closed in 113 days. There are 1 open pull requests and 0 closed requests.

It has a positive sentiment in the developer community.

The latest version of graql is 2.0.0

Quality

graql has 0 bugs and 0 code smells.

Security

graql has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

graql code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

graql is licensed under the AGPL-3.0 License. This license is Strong Copyleft.

Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

Reuse

graql releases are available to install and integrate.

graql has no build file. You will be need to create the build yourself to build the component from source.

Installation instructions are not available. Examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed graql and discovered the below as its top functions. This is intended to give you an instant insight into graql implemented functionality, and help decide if they suit your requirements.

Validates that all variables in the given set are bounds
Converts the body to a string
Returns the query string
Returns a string representation of the query
Returns the negation of this pattern
Compares two Unbinding variables
Compares this pattern with the specified pattern
Compares two disjunction objects
Compares this object with the specified pattern
Compares two rules
Overrides superclass method
Compares this object to another
Compares two type variables
Compares two concept variables
Compares this object with the specified object
Returns the string representation of the constraint
Checks that there are no remaining filters in scope
Check that the given list of delete variables are valid
Parses a label string
Overrides the superclass
Returns an unmodifiable set of keywords
Convert a value to its string representation

Get all kandi verified functions for this library.

graql Key Features

No Key Features are available at this moment for graql.

graql Examples and Code Snippets

No Code Snippets are available at this moment for graql.

Community Discussions

Trending Discussions on graql

Recursive query in GRAQL?

How to sort numerical data coming out of Grakn

When defining a rule via the Grakn Java API, I get an error when I try and exclude uniary relations

How to model roles hierarchies (and relations between them) with Grakn / Graql?

Fetching data from Grakn with Python

How to compute connected-component using Python Client in Grakn

Unable to use graql on commandline

QUESTION

Recursive query in GRAQL?

Asked 2020-Sep-07 at 14:53

Is there a way to define a recursive query in GRAQL, i.e. to match a pattern where an exact predicate path between entities is unknown (for example, how many of them)?

SPARQL added support for these in 1.1 version. Example from the Apache Jena Documentation:

...

ANSWER

Answered 2020-Sep-07 at 14:32

It is possible to achieve this in Graql, using Grakn's reasoning engine.

Graql match queries don't support a looping query syntax (yet, but it is planned), but you can define recursive logic in Grakn using a rule. To achieve recursion there should be a rule which contains in its when something of the same type as is inferred in a rule's then.

In Graql this exact friend example goes as follows. This example doesn't use recursion as we are only looking for 1 or 2-hop looping.

First you need a schema:

Source https://stackoverflow.com/questions/63778221

QUESTION

How to sort numerical data coming out of Grakn

Asked 2020-Jun-16 at 12:02

I have numerical data coming out of grakn with a query that looks like this:

...

ANSWER

Answered 2020-Jun-16 at 12:02

The answers of a get can be sorted using sort as follows:

Source https://stackoverflow.com/questions/62217702

QUESTION

When defining a rule via the Grakn Java API, I get an error when I try and exclude uniary relations

Asked 2020-May-13 at 16:37

type("overlap-rule").sub(Graql.Token.Type.RULE)
            .`when`(
                and(
                    `var`("t1").isa("trip"),
                    `var`("t2").isa("trip"),
                    `var`("t1").neq(`var`("t2"))
                )
            ).then(
                `var`().isa("trip-overlap")
                    .rel("overlapped-trip", "t1")
                    .rel("overlapped-trip", "t2")

            )

...

ANSWER

Answered 2020-May-13 at 16:37

There are actually two kinds of "not equals" in Graql! There is the != that you used in the graql rule definition, which states that two concepts cannot be the same.

There is another type of not equals, that is written !== in the language itself, representing the comparison of attribute concept values!

The trick is that !== is written using var1.neq(var2) in the Java query builder, whereas != is written using var1.not(var2) in the query builder ;)

Source https://stackoverflow.com/questions/61775768

QUESTION

How to model roles hierarchies (and relations between them) with Grakn / Graql?

Asked 2020-Apr-28 at 20:17

I'm starting to use Grakn and I'm having a hard time with how roles and relationships are "linked". Specifically, I am having some difficulty modeling role hierarchies.

Considering a fictional example with two scenarios, first suppose I have only two types: person and object; and a purchasing relationship between a customer role hierarchy and a product role hierarchy.

So, I would have something like:

type: person

role: customer level 1
role: customer level 2 (sub customer level 1)
role: customer level 3 (sub customer level 2)

...

type: object

role: product level 1
role: product level 2 (sub product level 1)
role: product level 3 (sub product level 2) ...

The relationship is unique (buys) and is used to relate roles considering the respective levels in the hierarchy:

...

ANSWER

Answered 2020-Apr-28 at 20:17

To construct a role hierarchy in Graql you need to override a parent role with a child by defining a child relation.

I think that for your first case there are two possible options, depending upon what you want to restrict:

Source https://stackoverflow.com/questions/61484738

QUESTION

Fetching data from Grakn with Python

Asked 2020-Apr-28 at 17:30

I am using Grakn with the Python driver. I am trying a use case where the user can search for a song, for example Despacito, and then get recommendations of other similar songs. The result must contain songs of the same genre, and from the same producer. When I search for a song, I am able to get the related entities like singer, producer and genre of the song. What I want next are the other songs related to this producer and genre.

...

ANSWER

Answered 2020-Apr-28 at 17:30

Graql give results based on the constraints you provide, essentially ruling out any result that doesn't match the criteria you give. In your query you restrict $s to have a particular song-name and singer. Removing these constraints will give you the results you ask for:

Source https://stackoverflow.com/questions/61432646

QUESTION

How to compute connected-component using Python Client in Grakn

Asked 2020-Mar-13 at 10:14

I want to get clusters(or connected components) using Python client. I can do it with graql with following:

compute cluster in [company, c2c], using connected-component, where contains=V86179944;

I can run the query with Python as well:

...

ANSWER

Answered 2020-Mar-13 at 10:14

map() and collect_concepts (which will be removed in the next release of Client Python) are methods of the ConceptMap answer type. What you're getting back as the result of a compute cluster query is the ConceptSet answer type. ConceptSet has the set() method that returns the set of ids of concepts after the cluster computation.

Here you'll find the query types and their corresponding answer type and here you'll find the documentation on the set() method available on a ConceptSet.

Source https://stackoverflow.com/questions/60613954

QUESTION

Unable to use graql on commandline

Asked 2020-Feb-20 at 12:21

So I am using grakn core 1.5.7 on Ubuntu 18.04.

I want to use graql command.With older versions of grakn it was quite good to have a graql executable available.Here is the command i am using from inside my grakn folder.

...

ANSWER

Answered 2020-Feb-20 at 10:14

As of Grakn Core 1.5.0, the graql console command has been removed in favor of a combined command: grakn console -k mykeyspace...

Source https://stackoverflow.com/questions/60314564

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install graql

You can download it from GitHub.
You can use graql like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the graql component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

Grakn & Graql has been built using various open-source Graph and Distributed Computing frameworks throughout its evolution. Today Grakn & Graql is built using RocksDB, ANTLR, SCIP, Bazel, GRPC, and ZeroMQ, and Caffeine. In the past, Grakn was enabled by various open-source technologies and communities that we are hugely thankful to: Apache Cassandra, Apache Hadoop, Apache Spark, Apache TinkerPop, and JanusGraph. Thank you!.

Find more information at: