The following prefixes are used throughout the document, and may be used in the text input areas of the interactive examples without declaration.

@prefix rdf: 	<http://www.w3.org/1999/02/22-rdf-syntax-ns#> . 
@prefix rdfs: 	<http://www.w3.org/2000/01/rdf-schema#> . 
@prefix owl: 	<http://www.w3.org/2002/07/owl#> . 
@prefix xsd: 	<http://www.w3.org/2001/XMLSchema#> . 
@prefix foaf: 	<http://xmlns.com/foaf/0.1/> . 
@prefix dbp: 	<http://dbpedia.org/ontology/> . 
@prefix ex: 	<http://example.com/ns#> . 
@prefix ottr: 	<http://ns.ottr.xyz/0.4/> . 
@prefix ax: 	<http://tpl.ottr.xyz/owl/axiom/0.1/> . 
@prefix rstr: 	<http://tpl.ottr.xyz/owl/restriction/0.1/> .

The spreadsheet types.xlsx contains one sheet with instances of the ex:Type template that expands to RDF on the following form:

<http://example.com/data#a11>
        a       <http://example.com/schema#ClassA> .

Download the spreadsheet and do the following.

Add a new prefix declaration with the prefix test and namespace http://example.com/test# to the already existing prefix instruction in the first sheet of the spreadsheet file, and all more instances to the existing template instruction:

Expand the spreadsheet.

The second sheet of the spreadsheet file types.xlsx contains data which is not annotated with tabOTTR instructions. Add the necessary tabOTTR instructions so that the row

expands to

<http://example.com/test#c11>
        a       <http://example.com/schema#ClassC> .

Try to solve the exercise without altering the data, but rather create new columns that use spreadsheet the formula CONCATENATE to add the required prefixes to the data. (Note that not all functions are supported by the external API that WebLutra/Lutra uses, however CONCATENATE is, (but CONCAT is not).)

Use the indices of the template instruction to select the columns that should become instance arguments.

The spreadsheet PizzaOntologyInstances.xlsx contains several instances of the NamedPizza template.

Download the spreadsheet and note how lists are defined, and how types are set. Expand the spreadsheet.

The spreadsheet organizations.xlsx contains data about organisations. Add the neccesary tabOTTR instructions to the spreadsheet so that the data can be expanded as instances of the ex:Organization template below. You may also make adjustments to the template ex:Organization if you wish.

Tips:

• Remember to add a prefix instruction, if you use prefixes.
• Try to use auto typing: https://spec.ottr.xyz/tabOTTR/0.3/#2.3.3_auto_typing
• Invent an IRI for each organization, use a blank node, or change the signature of ex:Organization by setting a blank node as default value.
• You can use the formula =DATEDIF([cellref], TODAY(), "y") to calculate the difference in years between [cellref] and today. Note however, that this function is not supported by the external API that WebLutra/Lutra uses, therefore you must copy the contents of the column into a new column and remove the column containing the formulas.

The spreadsheet persons.xlsx contains data about persons. Add the neccesary tabOTTR instructions to the spreadsheet so that the data can be expanded as instances of the ex:Person template below. Try to extend the template to include all the information in the spreadsheet.

The web application that drives the interactive examples in this primer, called WebLutra, uses Lutra, the reference application for OTTR. Both applications are open source and available at http://gitlab.com/ottr/lutra/lutra. If you experience errors or have suggestions for improvements, please take a look at existing issues or file a new issue: http://gitlab.com/ottr/lutra/lutra/issues