|RDF Studio Quick Start|
Need to get up and running with RDF Studio fast? We show you a quick walkthrough that will get you up and running with the basics.
After this tutorial, you should be able to:
Estimated time: 15 minutes
Firstly, if you are new to RDF Studio then welcome! You can ask questions or make comments on our tutorials - simply use the comment facility at the bottom of this page.
To start with, we will learn how to open an RDF document in RDF Studio. RDF Studio comes with a relatively simple RDF document for you to start with - written in RDF/XML. To open it, do the following:
On the left hand Model Explorer pane, you should now see plants.rdf.
1. See The Semantics In plants.rdf
1.1 The Triples Panel
It's no fun opening RDF if you can't see the semantics embedded in it. To start with though, let's take a look at the RDF triples contained in plants.rdf. To do this, click the expand arrow to the left of the plants.rdf filename in Model Explorer. The options for viewing and editing the file will then be shown, like so:
Unfamiliar with triples in RDF? We recommend you start with our Semantic Web Primer series to get you started.
Now we want to see the basic RDF triples in the data. Let's do this by expanding the Data folder and double clicking on the Triples node, like so:
When you double click the Triples node, you should now see the triples panel open showing all the triples in the plants RDF model - comprising the subject, predicate and objects. On the right hand side of the RDF Studio window you should also see the Properties panel. When you click on an RDF triple, see how it shows you the subject, predicate and object.
Note Keep an eye on the Properties panel - when you click on various things in RDF Studio, it will often show you greater detail or help on what you are looking at.
1.2 The Classes & Subclasses Panel
Now we want to dig a little deeper and see the semantics our plants.rdf file contains.
To start with, let's look at its classes and properties. To do this, we need RDF Studio to see the data using an ontology vocabulary - such as OWL, or RDFS. The plants.rdf file may have OWL in already, but RDF Studio won't start interpreting that OWL until we tell it to. So let's select an ontology vocabulary through which to interpret our plants RDF data.
Not sure what classes are? Our classes and individuals concept tutorial will get you up to speed.
First, select the plants.rdf file again in Model Explorer. On the Properties panel, you should now see various properties of the plants.pdf model.
Select the Ontology Vocabulary in the Properties panel and select OWL Full, as below:
RDF Studio will now be able to see all the OWL classes and properties in your RDF model. So, to see the classes (and individuals) in the model, go to Model Explorer once more, expand the Semantics folder and double click on Classes - this will open the classes panel, as shown below:
Notice if you click on a particular class in the class hierarchy, you will again see some details of your selected class in the Properties panel.
1.3 The Properties & Subproperties Panel
Now you have looked at the classes view, see if you can find your way around the properties & subproperties view. To open the properties view, double click on the Properties node under the Semantics folder.
Not sure what properties are? Our properties concept tutorial will get you up to speed.
You should now see a view similar to below:
The Properties view shows the properties, and subproperties hierarchy defined in the model. For plants.rdf, we have a single property defined: the plants:family property. If you select it, you will also see the predicates defined for this property in the predicates sub-panel - in this case showing that it is an instance of an OWL datatype property.
Note If you are new to RDFS & OWL, we recommend reading our RDFS & OWL primer tutorial as a way of getting started.
2. Draw A Graph Of Your Model
There may be times where visualising your RDF model as a graph gives useful insights into how the model is structured. RDF Studio allows you to quickly draw a graph of the model to see the nodes, and predicates (arrows) in the model which you can then export as an image (for use in presentations) or a GraphML document (which you can load into other programs).
Note Drawing graphs for RDF models with a large number of nodes is not recommended, as such graphs tend to be overly complex.
To draw a graph of the model, click the Node Graph icon under the Visualization folder in Model Explorer, as below:
The Node Graph view will then open:
You can use the mouse to drag the nodes around the graph area to finetune it before exporting it. You can also zoom in and out of the graph using the zoom control.
3. Open The Model In The SmartRDF Editor
We've seen the triples, classes and properties in the model, as well as viewed the model as a graph of nodes and predicate arrows. What we haven't seen yet is the RDF syntax itself the model is built from. If you're the sort of person who prefers to edit something by getting right down to the syntax, this will be the tool for you.
To open plants.rdf in the SmartRDF editor, find the RDF Editor node in Model Explorer, as below:
Just as an experiment, try editing some of the XML tags in the plants.rdf document, and see how RDF Studio intelligently suggests what terms you may mean or wish to add as you type. We will explore this feature further in later tutorials when we come to building our own ontology.
You have completed this lesson. You should now understand the following:
You should now be able to start the following tutorial: