Global Node Global Node Design

Global Node User Requirements Software Requirements Detailed Solution Impact Next steps What can you expectWhat do we expect  agreement  go ahead  awareness  direction

Global Node 1. A user should be able to obtain a list of all RNs 2. A user should be able to obtain a theme description of all RNs 3. A user should be able to obtain all local collections from every RN 4. A user should be able to obtain all local collections from a selected RN User Requirements One Root Node (RN) per Retrieval Manager

Global Node A Global Node (GN) is a theme collection A GN is replicated (see also management) A local GN search  RN_identifier  Theme Keyword A local GN present  RN_identifier + Theme  ‘complete RN collection descriptor’ A remote GN search  RN_identifier A remote GN present  RN_identifier + Theme Collection_identifier + Theme- + Spatial- + Temporal Keyword Software Requirements

Global Node Software Requirements

Global Node Global Node Collection Collection Descriptor ItemDescriptorIDTheme Collection Item Descriptor ID ItemDescriptorNameGlobal Collection CollectionType CollectionHierarchyCategory‘Global’ IncludedCollectionDescriptors ItemDescriptorIDThemeCollection Root RM1 ItemDescriptorIDThemeCollection Root RM2 ItemDescriptorIDThemeCollection Root RM3 ItemDescriptorIDThemeCollection Root RM4 ItemDescriptorIDThemeCollection Root Local Where to store the ThemeKeyword’s for each ThemeCollection Root? IncludedCollectionDescriptors= 1{ItemDescriptorId++}n+ ItemDescriptorId++= ItemDescriptorId + Theme Keyword Detailed solution (data)

Global Node Options for ‘otherinfo’ in the Search message Local is the current default Global Local which will only target the Global Node and included roots Global Remote will target the Global Node and all included roots and their included collections (Local or remote) Remote will target the root node of the local coll structure or a specified collection within the local collection structure and any included collections local or remote. Current capability Detailed solution (search)

Global Node Explain – theme keyword Search – force local search in other sites Existing Collection Structures – change in structure (theme keyword) Federation Management – introduction of replication –... Next steps Impact and next steps