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example-yarrrml-rules's Introduction

YARRRML Example rules

This repository contains example YARRRML rules to generate Linked Data

  • dbpedia_spotlight: when using DBpedia Spotlight
  • facebook: mapping your Facebook data
  • multiple_conditions: joining 2 mappings based on multiple conditions (logical AND by default)
  • twitter: mapping your Twitter data

License

This code is copyrighted by Ghent University – imec and released under the MIT license.

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example-yarrrml-rules's Issues

Unexpected characters error with XPath predicates

I have an example.xml file like this:

<people>
    <person id="I100194341916">
        <name>
            <nameForm>
                <part type="Given" value="Robert"/>
                <part type="Surname" value="Walpole"/>
            </nameForm>
        </name>
    </person>
</people>

and a YARRRML file like this:

prefixes:
  ex: http://example.org/
mappings:
  people:
    sources:
      - ['example.xml~xpath','/people/person']
    s: ex:person.$(@id)
    po:
      - [a, foaf:Person]
      - [foaf:givenName, $(name/nameForm/part[@type='Given']/@value)]

When I try to parse the YARRRML I get an error:

line 8: Unexpected characters near "/@value)]".

However if I remove the XPath predicate [@type='Given'] from the YARRRML and then modify the generated RML to re-add the predicate as follows:

:om_001 a rr:ObjectMap;
    rml:reference "name/nameForm/part[@type='Given']/@value";
    rr:termType rr:Literal.

Then the mapping works as expected.

Any thoughts on this please?

WIP: Make example with a nested condition

TODO: I still need to test this

myMapping:
    sources:
      - ["data.csv~csv"]
    s: http://example.com#$(ID)
    po:
      - p: ex:relation
        o:
          - mapping: myOtherMapping # Just and example
            condition:
              function: grel:boolean_and
              parameters:
                - parameter: grel:param_rep_b
                  value:
                    function: equal
                      parameters:
                        - [str1, "$(myId)"]
                        - [str2, "$(myOtherId)"]
                - parameter: grel:param_rep_b
                  value:
                    function: equal
                      parameters:
                        - [str1, "$(myName)"]
                        - [str2, "$(myOtherName)"]

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