Purpose

The Integrative Levels Classification (ILC) is a comprehensive “freely faceted” knowledge organization system not previously expressed as SKOS (Simple Knowledge Organization System). This paper reports and reflects on work converting the ILC to SKOS representation.

Design/methodology/approach

The design of the ILC representation and the various steps in the conversion to SKOS are described and located within the context of previous work considering the representation of complex classification schemes in SKOS. Various issues and trade-offs emerging from the conversion are discussed. The conversion implementation employed the STELETO transformation tool.

Findings

The ILC conversion captures some of the ILC facet structure by a limited extension beyond the SKOS standard. SPARQL examples illustrate how this extension could be used to create faceted, compound descriptors when indexing or cataloguing. Basic query patterns are provided that might underpin search systems. Possible routes for reducing complexity are discussed.

Originality/value

Complex classification schemes, such as the ILC, have features which are not straight forward to represent in SKOS and which extend beyond the functionality of the SKOS standard. The ILC's facet indicators are modelled as rdf:Property sub-hierarchies that accompany the SKOS RDF statements. The ILC's top-level fundamental facet relationships are modelled by extensions of the associative relationship – specialised sub-properties of skos:related. An approach for representing faceted compound descriptions in ILC and other faceted classification schemes is proposed.

中文翻译：

---

将复杂的分类方案迁移到语义网：使用 SKOS RDF 表达综合级别分类

目的

综合层次分类 (ILC) 是一个综合的“自由分面”知识组织系统，以前没有表示为 SKOS（简单知识组织系统）。本文报告并反思了将 ILC 转换为 SKOS 表示的工作。

设计/方法/方法

考虑到 SKOS 中复杂分类方案的表示，ILC 表示的设计和转换为 SKOS 的各个步骤在先前工作的背景下进行了描述和定位。讨论了转换中出现的各种问题和权衡。转换实现采用了 STELETO 转换工具。

发现

ILC 转换通过超出 SKOS 标准的有限扩展捕获了一些 ILC 面结构。SPARQL 示例说明了如何在索引或编目时使用此扩展来创建分面的复合描述符。提供了可能支持搜索系统的基本查询模式。讨论了降低复杂性的可能途径。

原创性/价值

复杂的分类方案（例如 ILC）具有在 SKOS 中无法直接表示的特征，并且超出了 SKOS 标准的功能。ILC 的方面指标被建模为伴随 SKOS RDF 声明的rdf:Property子层次结构。ILC 的顶级基本面关系由关联关系的扩展建模 - skos:related 的专门子属性。提出了一种在 ILC 和其他分面分类方案中表示分面复合描述的方法。