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MedBiquitous XML Design Patterns

MedBiquitous XML Design Patterns. Rachel Ellaway 1 , Valerie Smothers 2 , Joel Farrell 3 , Daniel Rehak 1 Northern Ontario School of Medicine, 2 MedBiquitous, 3 IBM. MedBiquitous 2012. Conflict of interest.

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MedBiquitous XML Design Patterns

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  1. MedBiquitous XML Design Patterns Rachel Ellaway1, Valerie Smothers2, Joel Farrell3, Daniel Rehak 1Northern Ontario School of Medicine, 2MedBiquitous, 3IBM MedBiquitous 2012

  2. Conflict of interest We have no involvement with industry that creates a conflict of interest to disclose with respect to this workshop

  3. Overview • MedBiquitous develops “information technology standards for healthcare education and competence assessment … based on XML and Web services standards” • We translate real world needs to technical models and frameworks • How can we improve MedBiquitous’ community in doing this work • Try seeing the world in terms of design patterns …

  4. Design Patterns

  5. Design patterns • From architecture – Andrew’s ‘pattern language’ • A “pattern describes a problem that occurs over and over again … and then describes the core of the solution to that problem, in such a way that you can use this solution a million times over, without ever doing it the same way twice” • Vocabulary = named, described solutions to problems … called "design patterns” • Also syntax (context) and grammar (method) A Pattern Language, Christopher Alexander, with Sara Ishikawa, Murray Silverstein, Max Jacobson, Ingrid Fiksdahl-King, and Schlmo Angel, Oxford University Press 1977

  6. Design patterns in s/w • OO – reusability, efficiency, understandability • creational patterns – how entities are defined • Properties, vocabularies, classes • structural patterns – how entities are grouped and related • Trees, taxonomies, objects, libraries • behavioral patterns – what entities can do • Rules, state, interpret

  7. Design patterns in interop • creational patterns – how entities are defined • properties, vocabularies, classes • structural patterns – how entities are grouped and related • trees, taxonomies, objects, libraries • behavioral patterns – what entities can do • rules, state, interpret

  8. Design patterns in interop Four main layers: • Vocabularies • XML • Schema design • Architectures

  9. Vocabulary Design Patterns • Defined descriptors • Required (unchanging) • Recommended • may change • may be ignored • may be augmented • Global – MeSH, UMLS • Specific • Language issues, translation, syntax etc

  10. XML Design Patterns • XML is itself a pattern • Tree - nodes • Attributes • Vocabularies • Namespaces • Special handling - PCDATA

  11. XML Design Patterns attributes vocabularies <Properties> <Counters> <Counter id="608" isVisible="true"> <CounterLabel>time</CounterLabel> <CounterInitVal>0</CounterInitVal> </Counter> </Counters> </Properties> tree entities

  12. Schema Design Patterns • Single tree – healthcare LOM • Contiguous, equivalent concepts • Multiple trees – MVP • Non-contiguous, non-equivalent concepts

  13. Single tree schema: MedBiquitous’ Healthcare LOM From IEEE MedBiquitous Extension

  14. Multiple tree schemas: MedBiquitous’ Virtual Patient SCORM package Virtual Patient Data Data Availability Model Media Resources Activity Model

  15. Architecture Design Patterns • Common XML data structures • Reuse vocabularies – MeSH, UMLS • Referencing other standards: • Reuse MedBiquitous S&S, whole or part • External S&S can often be reused (check license) e.g. content packaging, LOM etc • xx

  16. Architecture Design Patterns person resource competency

  17. Why is this important? • MedBiquitous’ work is a community effort • Some standards development processes hindered by limited familiarity with DPs • Interop DP literacy can help to streamline and accelerate standards development

  18. Design patterns in interop Many layers: • Vocabularies • XML • Schema design • Architectures Look for them, see them, understand them, use them One from this list? Is this a tree? Apples and architraves? What classes, functions and architectures can we reuse?

  19. Design Patterns

  20. Thank you! Rachel Ellawayrellaway@nosm.ca Valerie Smothersvsmothers@jhmi.edu DP: given:familyuser@domain

  21. MedBiquitous XML Design Patterns Rachel Ellaway1, Valerie Smothers2, Joel Farrell3, Daniel Rehak 1Northern Ontario School of Medicine, 2MedBiquitous, 3IBM MedBiquitous 2012

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