SchemaLogic Workshop Part 2 Tools for Enterprise Metadata Management and Synchronization Prepared for the University of Washington Information School Applied Metadata Class

Review - SchemaLogic Objects Content Classes Elements Next up: Vocabularies Terms Vocabulary Views

SchemaLogic Object Relationships

Questions from last week ‘Nested’ element structure –Mostly a representation problem/limitation in this version of Workshop –Because of the importance of re-use, don’t want to put in structural constraints –However, a way of providing visual separation, domains, would be useful. Not prioritized yet. –Permissions for specific domains Validation checking, especially in names –Just hasn’t been prioritized yet –Would need to be configurable

Vocabularies, Terms, and Vocabulary Views

Vocabularies A vocabulary is a structured collection of metadata terms to be used as content in Elements. Vocabularies can be simple lists of terms or complex hierarchies. Vocabularies are how SchemaServer manages corporate Taxonomies Thesaurus-structured Vocabularies –Support for poly-hierarchies –Extensible term relationship types –Localization support –Scope notes

Vocabularies (cont.) Describes a conceptual domain, i.e. Geography, color, keywords, video formats Collection of terms and relationships between the terms. Supports most ANSI z39.19 features –National Information Standards Organization –“Guidelines for the Construction, Format, and Management of Monolingual Thesauri”

Terms An approved metadata value that can be used to tag content. Terms can be reused in multiple Vocabularies. Terms are structured to have relationships.

Term Relationships Associate one term to another in the context of a vocabulary Qualified by a type that describes the nature of the relationship.

Term Relationship Types Extensible Provide business rules for vocabulary construction and advanced vocabulary filtering capabilities. Three term relationship types 1.Hierarchical Term Relationships (most common) 2.Entry Term Relationships (synonym or alternate form of Terms) 3.Related Term Relationships The Term Relationships belong to a particular Vocabulary but the Terms themselves do not. Terms may participate in multiple vocabularies by virtue of multiple relationships

Term Relationship Types Hierarchical Parent/Child Broader/Narrower Preferred terms Must have a path to the Root Term May have multiple paths to the root (polyhierarchy) May not be a child of itself (no circular relationships) Entry Synonyms Equivalency Used to create “synonym rings” May not have any “children” or outbound terms Must be related to a hierarchical term One hierarchical term may have many Entry terms Related Associated Terms “See Also” May span Vocabularies

Application via SchemaLogic Workshop

Log into Workshop User name Password Server location Server URL: Make sure you have Java Web Start v1.4.2 installed prior to accessing Workshop

Vocabularies Vocabulary Properties describe the vocabulary itself, not the terms within the vocabulary.

Vocabulary Terms Terms are entities unto themselves – may live in multiple vocabularies Have their own properties Are created in the context of a vocabulary Have inbound and outbound relationships

Terms - Inbound and outbound relationships All Term Relationships have a direction and can be visualized as an arrow pointing from one Term to another.

Term Relationships Describe the connection between two terms Have Business rules associated with them Are Extensible Are used to create multiple views of or subsets of vocabularies

Term Relationship Type - examples Related Term “Hue” Entry Term “Colour”

Term Relationship Type Editor Creation of new sub-types currently not available in Workshop

Vocabulary Views Subset of larger Vocabulary. For re-use, best to avoid developing and maintaining many small, fractured Vocabularies. Therefore use Vocabulary Views Different types of subsets allowed: –Subset by branch –Subset by depth (of hierarchical vocabulary) –Subset by term relationship type Vocabulary Views are typically used in Element Type definitions that are of "Vocabulary"-type to qualify the set of Terms for that Element.

Vocabulary Views Creation of subsets of a vocabulary View branches View by Relationship type

Building a Vocabulary Add a new vocabulary Add a new term to that vocabulary Drag and drop a term from a different vocabulary Create a polyhierarchy Delete a term Add an Entry (synonym) Term