OpenLink Structured Data Sniffer

Intro

The OpenLink Structured Data Sniffer (OSDS) is an extension for Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge, Opera and other Chromium-based browsers, that detects, presents, and offers interaction interfaces for structured data (such as Knowledge Graphs) embedded in web pages using any of the following formats:

• CSV
• JSON
• JSON-LD
• Microdata
• Plain Old Semantic HTML (POSH)
• RDFa
• RDF-Turtle
• RDF-XML
• JSON
• CSV
• RSS
• Atom
• Markdown Tables

License

Copyright 2015-2022 OpenLink Software

This software is licensed under the GNU General Public License (see COPYING).

Note: that the only valid version of the GPL license as far as this project is concerned is the original GNU General Public License Version 2, dated June 1991.

Deployment

To deploy this extension on your local machine you can either clone the git source tree or download a source archive and then install the extension into your Chrome or Opera browser on the same system. In most cases, you can also download a prebuilt extension binary from the store for your browser (Chromium-based browsers use the extension from the Chrome store; Safari uses the extension from the Apple App Store; Firefox uses the extension from the Firefox store; and Microsoft Edge uses the extension from the Microsoft store.)

Clone the git source tree

Clone the sources from github using the following commands, which will automatically download the latest develop branch:

$ cd src
$ git clone https://github.com/OpenLinkSoftware/OSDS_extension

Download a source archive

Download and extract a .tar.gz or .zip, either from one of the stable releases, or directly from one of the following links:

• latest stable .tar.gz
• latest stable .zip
• latest development .tar.gz
• latest development .zip

Install the extension in Chrome

To install this extension manually, take the following steps:

1. Open the Chrome browser
2. Select from menu: Chrome -> Preferences -> Extensions
3. Check the [X] Developer mode box
4. Choose the option Load unpacked extension...
5. Navigate to the folder containing the extracted source code
6. Press the Select button

Install the extension in Microsoft Edge

To install this extension manually, take the following steps:

1. Open the Edge browser
2. Select from menu: Edge -> Preferences -> Extensions
3. Check the [X] Developer mode box
4. Choose the option Load unpacked extension...
5. Navigate to the folder containing the extracted source code
6. Press the Select button

Install the extension in Opera

To install this extension manually use the following steps:

1. Open the Opera browser
2. In address bar type in opera:extensions
3. Press the Developer Mode button
4. Choose the option Load unpacked extension...
5. Navigate to the folder containing the extracted source
6. Press the Select button

Install the extension in Firefox

Download the Firefox OSDS .zip file and extract the .xpi file.

NOTE: Only temporary install is possible for unsigned .xpi file in last versions of Firefox.

To install this extension manually in Firefox, use the following steps:

1. Open the Firefox browser
2. In address bar type: about:addons or choose menu ** Add-ons**
3. Click on Gear icon and choose Debug Add-ons
4. Click on Load Temporary Add-on
5. Navigate to the directory where you extracted the OSDS_FF.xpi file, select this file and press the Open button

Examples

Navigate to a page containing structured data such as any of those below, and click on the sniffer icon that appears in the address bar:

• OpenLink Software Homepage
• BBC News Homepage
• Ted.com talk by Susan Etlinger
• DBpedia article on Semantic Web