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μRaptor 
A DOM based system with appetite for hCard elements
μRaptor is hungry
Training Phase 
Clean the HTML
Training Phase 
Clean the HTML 
DOM sub-trees
Training Phase 
Clean the HTML 
DOM sub-trees 
CSS class co-occurrence 
author
Training Phase 
Clean the HTML 
DOM sub-trees 
CSS class co-occurrence 
CSS Selectors
Training Phase 
Clean the HTML 
DOM sub-trees 
CSS class co-occurrence 
Value Constraints 
CSS Selectors 
vcard:email mailto : ALPHA PUNCTUATION ALL_LOWERCASE . ALL_LOWERCASE 
vcard:email mailto : ALPHA PUNCTUATION ALL_LOWERCASE . com 
vcard:email mailto : ALPHA @ ALPHANUMERIC . ALL_LOWERCASE 
vcard:email mailto : ALPHA @ ALPHANUMERIC . com 
vcard:email mailto : ALL_UPPERCASE ****@ ALL_LOWERCASE . ALL_LOWERCASE 
vcard:bday NUMBER - SMALL_NUMBER - SMALL_NUMBER 
vcard:bday MEDIUM_NUMBER - SMALL_NUMBER - SMALL_NUMBER 
We could determine patterns for emails for example: 
… or even for birthdays 
Extraction Phase 
Clean the HTML 
DOM sub-trees 
CSS class co-occurrence 
Value Constraints 
Pattern Detection 
CSS Selectors
Extraction Phase 
Clean the HTML 
DOM sub-trees 
CSS class co-occurrence 
Value Constraints 
Pattern Detection 
Elements Qualification 
CSS Selectors
Clean the HTML 
DOM sub-trees 
CSS class co-occurrence 
Value Constraints 
Pattern Detection 
Elements Qualification 
Models Validation 
CSS Selectors 
Extraction Phase 
RDF Model 
From μRaptor 
RDF Model 
Test set 
? = 0.94 = 0.7 = 0.8
μRaptor 
https://github.com/emir-munoz/uraptor
We made the discovery of the new μRaptor species and I am very pleased some researchers helped us understanding its feeding habits 
Godzilla is a doll compared to μRaptor! I am currently working on a script for an upcoming movie 
As a kid I always wanted to see an actual dinosaur. Today my dream comes true 
Damn, he is better than me!

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μRaptor: A DOM-based system with appetite for hCard elements

  • 1. μRaptor A DOM based system with appetite for hCard elements
  • 3.
  • 5. Training Phase Clean the HTML DOM sub-trees
  • 6. Training Phase Clean the HTML DOM sub-trees CSS class co-occurrence author
  • 7. Training Phase Clean the HTML DOM sub-trees CSS class co-occurrence CSS Selectors
  • 8. Training Phase Clean the HTML DOM sub-trees CSS class co-occurrence Value Constraints CSS Selectors vcard:email mailto : ALPHA PUNCTUATION ALL_LOWERCASE . ALL_LOWERCASE vcard:email mailto : ALPHA PUNCTUATION ALL_LOWERCASE . com vcard:email mailto : ALPHA @ ALPHANUMERIC . ALL_LOWERCASE vcard:email mailto : ALPHA @ ALPHANUMERIC . com vcard:email mailto : ALL_UPPERCASE ****@ ALL_LOWERCASE . ALL_LOWERCASE vcard:bday NUMBER - SMALL_NUMBER - SMALL_NUMBER vcard:bday MEDIUM_NUMBER - SMALL_NUMBER - SMALL_NUMBER We could determine patterns for emails for example: … or even for birthdays 
  • 9. Extraction Phase Clean the HTML DOM sub-trees CSS class co-occurrence Value Constraints Pattern Detection CSS Selectors
  • 10. Extraction Phase Clean the HTML DOM sub-trees CSS class co-occurrence Value Constraints Pattern Detection Elements Qualification CSS Selectors
  • 11. Clean the HTML DOM sub-trees CSS class co-occurrence Value Constraints Pattern Detection Elements Qualification Models Validation CSS Selectors Extraction Phase RDF Model From μRaptor RDF Model Test set ? = 0.94 = 0.7 = 0.8
  • 13. We made the discovery of the new μRaptor species and I am very pleased some researchers helped us understanding its feeding habits Godzilla is a doll compared to μRaptor! I am currently working on a script for an upcoming movie As a kid I always wanted to see an actual dinosaur. Today my dream comes true Damn, he is better than me!