Showing posts with label context. Show all posts
Showing posts with label context. Show all posts

Wednesday, 8 March 2017

Introduction: Metadata as Linked Data for Research Data Repositories

中文版




 “Every man has his own cosmology and who can say that his own is right.” said by Einstein. This is also true when we come to understand data semantics that one data may be differently interpreted by different data creators, curators and re-users. Then, how do we build a better research data repository?

We start with the point made by Willis, C., Greenberg, J., & White, H. (2012) that the metadata of research data increases the access to and reuse of the data. At the same time , Stanford, Harvard, and Cornell also believe the use of linked data technologies is a promising method to gather contextual information about research resources.

As a result, we look for for inspiration tools that can meet the urgent needs of innovative solutions providing feature-rich services for helping data publishing such as visualization, validation & reuse in different applications by research repositories (Assante, et.al, 2016). The CKAN (Comprehensive Knowledge Archive Network) as a major solution that makes linked metadata available, citable, and validated becomes our first choice. 
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For a general overview, our current results at data.odw.tw include:

1. An Use Case for Curation, Publication & Reuse of Metadata as Linked Data.
  • 843,309 CC licensed metadata records of 14 domains reused from the Union Catalog of Digital Archives Taiwan.
  • 44,806,400 triples (Linked Data) encoded with Dublin Core 15 Elements and Provenance Information.
  • 25,913,304 triples from 832,803 records semantically refined with spatial & temporal normalization, mapping, and linking with domain knowledges (external vocabularies, ontologies. and knowledges bases).
  • 14 domains include Archaeology,  Architecture, Archives, Artifacts, Biology, Geology, Manuscript, Multimedia, NewsMedia, PaintCal , RareBook, ResearchReuse, StoneRub.
  • 80 projects and 74 agents associated with metadata records are curated by their linked data formats and Wikidata ID: they have roles in NGO (2), Museum (5), Library (2), Government (9), Archive (1) and Academia (55).

2. A New Method to Manage Data for General-use & Discipline-specific Repositories.
  • For Open Science: using the CKAN (Comprehensive Knowledge Archive Network) as a major solution that makes linked metadata available, citable, and validated.
  • Availability: data shared with multiple formats, CSV, XML, Turtle, RDF/XML, JSON-LD, consumed both by human & machine.
  • Validation and Reproducibility: each data encoded with provenance in details while at the same time a complete mechanism for publishing article, data and code is designed and implemented.
  • A flexible and adaptable ontology for describing different data context (common knowledge or domain knowledge), event concepts (people, place, time) and objects collected by meaningful groups of different vocabularies is provided .
  • Data Visualization is enhanced and integrated through spatial and temporal mapping, filtering and linking system design.   

3. Data Semantically Enriched with Vocabularies and Knowledge Bases via Adaptable Mechanisms.
  • 18 international vocabularies used  for modeling common knowledge, and 5 domain specific vocabularies for place, time, art and humanity, or biology are applied.  3 knowledge bases like GeoNames, Wikidata, and Encyclopedia of Life are mapped and linked. 
  • The use of SPARQL language and endpoints  provide data analytic semantic queries both in local and external. In addition, data from the RDF triplestore can be easily used in 3rd-party applications.
  • Multiple DataClean Versions Mechanism:  we treat data cleaning as a kind of interpretation. Refined Versions (R Versions i.e. r1, r2, r3… ) provide different contexts to different needs of users. 
  • Multiple LinkedKnowledge Bases Mechanism:  more knowledge bases like DBpedia, WordCat, or LinkedGeoData can be linked in future via different R Versions without sacrificing  the  integrality of the original Version, encoded with DC 15 .
  • Multiple SemanticStructure Versions Mechanism:  different  interpretations results from the use of different vocabularies .  Co-exists of multiple R Versions  with different vocabularies or transforming vocabularies via SPARQL are  solutions. 
Reference:
  • Douglas, A. Vibert. "Forty minutes with Einstein." Journal of the Royal Astronomical Society of Canada 50 (1956): 99. P.100
  • Assante, M., Candela, L., Castelli, D., & Tani, A. (2016). Are scientific data repositories coping with research data publishing?. Data Science Journal, 15.. DOI: http://doi.org/10.5334/dsj-2016-006
  • Willis, C., Greenberg, J., & White, H. (2012). Analysis and synthesis of metadata goals for scientific data. Journal of the American Society for Information Science and Technology, 63(8), 1505-1520.
  • Cheng-Jen Lee, Andrea Wei-Ching Huang, Tyng-Ruey Chuang (2017) Metadata as linked data for research data repositories, International Symposium on Grids & Clouds (ISGC) 2017
  • 黃韋菁， 李承錱， 莊庭瑞 (2017) 結構資料的再次使用：語意、連結與實作, 圖書館學與資訊科學, 第 43 卷 第 1 期 2017 年 4月

Citation Information: Andrea Wei-Ching Huang (2017) Introduction: Metadata as Linked Data for Research Data Repositories. URL: https://andrea-index.blogspot.com/2017/03/metadata-as-linked-data-for-research.html

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Monday, 15 September 2014

Relations for Reusing (R4R) in a Shared Context: An Exploration on Research Publications and Cultural Objects

[[中文]]


 Will the rich domain knowledge from research publications and the implicit cross-domain metadata of cultural objects be compliant with each other? A contextual framework is proposed as dynamic and relational in supporting three different contexts: Reusing, Publication and Curation, which are individually constructed but overlapped with major conceptual elements. A Relations for Reusing (R4R) ontology has been devised for modeling these overlapping conceptual components (Article, Data, Code, Provence, and License) for interlinking research outputs and cultural heritage data. In particular, packaging and citation relations are key for building up interpretations for dynamic contexts. Examples are provided for illustrating how the linking mechanism can be constructed and represented as a result to reveal the data linked in different contexts.



Conclusion


Responding to recent developments (Section 1) that have challenged research data, ar-chival and cultural heritage communities to come up with a contextual framework to support a dynamic and shared context environment, we have proposed a framework (Section 2) composed of three activity contexts that can be identified for a shared common understanding. In Section 3, the establishment of an ontology, Relations for Reusing (R4R) facilitates the representation of contextual links between resources in diverse contexts. Thus, a shared context between research and cultural heritage domains not only can be identified through three activity contexts for a common understanding, but rela-tions existing in different contexts can be established and represented through the R4R ontology. In Section 4, we used R4R to represent a use case from the Digital Archives Taiwan in different scenarios to show how linking data from these two domains can enhance the semantic relationships with each other, as well as increase the potential for reusing and remixing when both are contextually linked. The above discussions are the answers to the questions raised in Section 1, and we further discussed and presented a comparison of five existing relation ontologies that distinguishes the R4R from previous works in Section 5.


The advantage of designing a new conceptual model to describe relations in a shared context is to ensure that articles, datasets, software codes, provenance and license information can be treated as first-class contextual objects. At the same time, the module-like design of RRObject and RRPolicy can be practiced in isolation, and the unifying repre-sentation of their relations is semantically clear enough but not so structurally heavy-weighted that curators or researchers would find it difficult to apply. The contextual framework and R4R ontology can be applied to representing the interlinking relations of digital collections to a semantic web format, and help standardize this process. The au-thors of this work also plan in the future to explore more use cases to test the validity and effectiveness of the framework and the R4R ontology.

In sum, the daT(S010384) is a digital object with rich metadata descriptions that are curated in the Curation context. It is published as a cultural object Y, with unique iden-tification, and is cited as a science object Z, interpreted by the citation relation for addi-tional professional interpretations. At the same time, the citing research can benefit from the implicit information embedded in the institution’s cataloging vocabularies for more domain knowledge. Through the exploration of the Shared Context and R4R represen-tation, the daT(S010384) now is capable of moving from its traditional role and acting “as a citation of active knowledge”, as outlined in [22]. Creating knowledge out of interlinked data [23] is thus one step forward by packaging provenance and license for a policy-aware Reusing context. As a result, when data sharing does not need to remove the data's initial context but rather embed it in a shared context, the difficulty to interpret the reused data [24] may be expected to be reduced through the use of the contextual framework and the R4R ontology proposed in this study.

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