jena | Apache Jena , a Java framework | Machine Learning library

 by   apache Java Version: jena-4.8.0 License: Apache-2.0

kandi X-RAY | jena Summary

kandi X-RAY | jena Summary

jena is a Java library typically used in Artificial Intelligence, Machine Learning applications. jena has no bugs, it has build file available, it has a Permissive License and it has high support. However jena has 2 vulnerabilities. You can download it from GitHub.
Apache Jena
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            kandi-support Support

              jena has a highly active ecosystem.
              It has 956 star(s) with 618 fork(s). There are 79 watchers for this library.
              It had no major release in the last 6 months.
              There are 42 open issues and 178 have been closed. On average issues are closed in 5 days. There are 13 open pull requests and 0 closed requests.
              It has a positive sentiment in the developer community.
              The latest version of jena is jena-4.8.0

            kandi-Quality Quality

              jena has 0 bugs and 0 code smells.

            kandi-Security Security

              jena has 2 vulnerability issues reported (1 critical, 1 high, 0 medium, 0 low).
              jena code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              jena is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              jena releases are not available. You will need to build from source code and install.
              Build file is available. You can build the component from source.
              It has 599005 lines of code, 64785 functions and 6336 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed jena and discovered the below as its top functions. This is intended to give you an instant insight into jena implemented functionality, and help decide if they suit your requirements.
            • Begins the scanner until the next regular expression matches
            • Computed surrogate pair
            • Determines if a Unicode character is compatible with the given code point
            • Show a specific code point
            • Sets the designated parameter
            • Converts a node to a boolean
            • Sets the value of an RDF term
            • Converts a node to a boolean
            • Start scanning until the next regular expression matches
            • Fills the input buffer
            • Execute a POST container
            • Defines an entity definition
            • Reads a tuple definition
            • Entry point for testing
            • Blocking read
            • Tokenizes and returns the next token
            • Gets the text index
            • Adds a duration to an instance
            • Initialize writer factory
            • Process module definitions
            • Creates the dispatch table
            • Moves the scanner until the next regular expression matches
            • Start scanning and return the next token
            • Creates all supported schema types
            • Implementation of the standardScheme read method
            • Entry point for testing purposes
            • Moves to the next batch
            Get all kandi verified functions for this library.

            jena Key Features

            Apache Jena

            jena Examples and Code Snippets

            No Code Snippets are available at this moment for jena.

            Community Discussions

            QUESTION

            java.lang.UnsupportedClassVersionError trying to run Jena ARQ to follow along with O'Reilly SPARQL book
            Asked 2022-Mar-19 at 18:04

            I'm trying to get Jena ARQ as suggested in O'Reilly SPARQL 1.1 book so I can follow along with the query examples in the book. I've downloaded apache-jena-.4.0.zip from jena.apache.org/download/index.cgi and follwed the instructions to extract and set JENA_HOME and PATH environmet variables.

            When I run ARQ.bat from windows cmd terminal I get

            ...

            ANSWER

            Answered 2022-Mar-19 at 18:04

            Class file version 55.0 is equivalent to Java 11 (can be seen for example here). However, the Java version you install from java.com is Java 8. Therefore you need to use at least Java 11, but newer versions (e.g. Java 17) might work as well.

            You can obtain newer versions of the Oracle JDK here, or you can use Open JDK builds, for example from here. See for example this question for differences between the Oracle JDK and Open JDK.

            Source https://stackoverflow.com/questions/71540155

            QUESTION

            Jena JavaScript custom functions scriptEngine null error
            Asked 2022-Mar-10 at 14:25

            Summary: I am trying to use the documentation on JavaScript SPARQL Functions to get a minimal working example of calling a custom javascript function, but it results in a scriptEngine null error.

            Details: I setup a fuseki environment following the Docker instructions, so:

            ...

            ANSWER

            Answered 2022-Mar-10 at 10:28

            In Apache Jena 3.16.0, the JS engine was Nashorn. Nashorn was deprecated in Java 11 and removed in Java17.

            An earlier Java version will have Hashorn in.

            Now Jena version 4.4.0 uses the javascript engine of choice which has been added to the classpath, and hence needs to be in the dockerfile. Jena testing uses GraalVM.

            Source https://stackoverflow.com/questions/71413050

            QUESTION

            Block implicit location mapping loading in Jena
            Asked 2022-Feb-17 at 23:17

            What would be a good and simple way to block implicit location mapping loading in Jena?

            In other words, if there are files with the following patterns found:

            ...

            ANSWER

            Answered 2022-Feb-17 at 23:17

            Call LocationMapper.setGlobalLocationMapper before any Jena operation is invoked (specifically, before JenaSystem.init happens, and that happens via class statics on all API ways into Jena).

            Example:

            Source https://stackoverflow.com/questions/71157639

            QUESTION

            Storing RDF to Triple Store as input: Conversion from CSV to RDF
            Asked 2022-Feb-05 at 16:46

            I am using Triple Store called Apache Jena Fuseki for storing the RDF as input But the thing is that i have data in CSV format. I researched a lot but didn't find direct way to convert CSV to RDF but there is tarql tool which is command line tool that can do the job but the thing is that i need a python script that directly converts my CSV to RDF form.

            I have used the tools like openRefine and tarql but i need python script to do this job and i have read somewhere that owlready2 tool also used to convert CSV to RDF but when i used to visit the official site then i found that they are using OWL file for this work.

            Thanks!

            ...

            ANSWER

            Answered 2022-Feb-05 at 16:46

            CSVW - CSV on the Web - is a W3C Recommendation for this. There is a python implementation.

            Or you can run "tarql" from python by forking a subprocess.

            Source https://stackoverflow.com/questions/70997605

            QUESTION

            Search, pagination and sorting features not applying to datatable
            Asked 2022-Jan-25 at 15:12

            I'm using the PostgreSQL database and attempting to display details from the database in a JSP page using a data table. The issue here it displays only the database information but pagination, sorting and searching features are not getting implemented for the data table. I have looked for solutions but it still doesn't work.

            ...

            ANSWER

            Answered 2022-Jan-25 at 06:52

            You should write the first table like this format because data table follow this format:

            Source https://stackoverflow.com/questions/70844214

            QUESTION

            How to convert a map to html table in Go
            Asked 2022-Jan-14 at 19:44

            I'm newbie in Go and practicing, could you please help to convert a map to an html table in GO? I have a function that fetches some data from some rest end points and return a map that can vary in size based on the result I get back from the endpoints.

            ...

            ANSWER

            Answered 2022-Jan-14 at 19:44

            The easiest way in my opinion is to use the html/template package. The docs of text/template explain the syntax, in case you are not familiar with the templating engine.

            Like so (playground link):

            Source https://stackoverflow.com/questions/70715508

            QUESTION

            optimizing a SPARQL query when using a custom function in Jena
            Asked 2022-Jan-04 at 16:25

            I have the following SPARQL query on a Owl Ontology, using Jena:

            ...

            ANSWER

            Answered 2022-Jan-04 at 16:25

            Per the very informative answer of UninformedUser:

            Source https://stackoverflow.com/questions/70569610

            QUESTION

            How to get in Jena the exact range of an ObjectProperty with restrictions?
            Asked 2021-Dec-19 at 18:47

            I have an owl/rdf schema with object properties with range restrictions, and I'm unable to get with the Jena API the effective range class.

            I would like to get the classes which are defined in the ontology as the range of a property. For example, with the following schema:

            ...

            ANSWER

            Answered 2021-Dec-15 at 15:11

            Per the useful comments above, it now works. I'm doing:

            Source https://stackoverflow.com/questions/70336778

            QUESTION

            Accessing Object Property for Individual using Apache Jena
            Asked 2021-Dec-08 at 21:50

            I have created an OWL ontology using Protégé, describing a patient database system. I am now attempting to develop a Java code using Apache Jena to read the OWL file I created, then perform a number of operations on it. My primary goal is to get my code to be able to find a specific Individual by name (Patient name for example) and then access a specific Object Property for that individual, and output its value. For example, A patient "John" has an object property "Treated_By" which corresponds to another individual "Amy" (Amy is an individual of type doctor). However, I have been unable to figure out which Jena method is used to retrieve Object property values from a certain individual.

            Here is my code (Please ignore comments, they are fragments of previous attempts for this task):

            ...

            ANSWER

            Answered 2021-Dec-08 at 21:50

            Try this (replace the property URI accordingly):

            Source https://stackoverflow.com/questions/70281813

            QUESTION

            Query on string not working in SPARQL with Fuseki (MAKG dataset)
            Asked 2021-Dec-06 at 23:07

            I would like to make a SPARQL query using MAKG (Microsoft Academic Knowledge Graph) (https://makg.org/) and DBPedia datasets (using SERVICE keyword) on Apache Jena Fuseki.

            Before that, I want to test some simpler queries for just MAKG such as:

            ...

            ANSWER

            Answered 2021-Dec-06 at 23:07

            The makg.org server is Virtuoso which uses RDF 1.0 for data so "hydrogen"^^xsd:string != "hydrogen".

            Apache Jena Fuseki uses RDF 1.1 where "hydrogen"^^xsd:string is the same as "hydrogen" .

            The problem is that the query sent is sending "hydrogen" because it is reconstructing the query service-part into a string using RDF 1.1 abbreviations.

            The way round this using Fuseki is to use a filter.

            Source https://stackoverflow.com/questions/70244686

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

            Vulnerabilities

            No vulnerabilities reported

            Install jena

            You can download it from GitHub.
            You can use jena 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 jena 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

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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            https://github.com/apache/jena.git

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            gh repo clone apache/jena

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            git@github.com:apache/jena.git

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