1. Globally Unique Identifiers Workshop (GUID-1) International Working Group on Taxonomic Databases - TDWG Global Biodiversity Information Facility - GBIF National Evolutionary Synthesis Center - NESCent February 1-3, 2006 Durham, North Carolina, USA

2. February 1-3, 2006 TDWG Globally Unique Identifiers Workshop (GUID-1) National Evolutionary Syntesis Center (NESCent) Durham, NC, USA GUID Definition  GUID system provides mechanisms to identify and access data objects

3. February 1-3, 2006 TDWG Globally Unique Identifiers Workshop (GUID-1) National Evolutionary Syntesis Center (NESCent) Durham, NC, USA GUID Main Characteristics 1.It has identifiers: Character strings associated with data objects Examples: GBIF and doi:10.1000/182 2.An identifier is persistent: it is permanently associated with the data object 3.An identifier is globally unique: It identifies a single data object uniquely within the system 4.Identifiers are actionable: Identifiers take to the data object. In other words, objects are locatable. 5.GUID system provides metadata about data objects.

4. February 1-3, 2006 TDWG Globally Unique Identifiers Workshop (GUID-1) National Evolutionary Syntesis Center (NESCent) Durham, NC, USA GUID Scope  And that’s it!!  Outside of scope of GUID System: Establishing relationships between objects. Query on properties other than ids Indexing services and data warehouses Discovery and harvest of data and metadata Etc. GUID identifiers: Are associated with data objects Identifiers are persistent Identifiers are globally unique Identifiers are actionable Take you to data and metadata

5. February 1-3, 2006 TDWG Globally Unique Identifiers Workshop (GUID-1) National Evolutionary Syntesis Center (NESCent) Durham, NC, USA GUID  Outside of scope  But still very important!  Tackled by other groups ABCD, DarwinCore, NCD, SDD, TCS, TAG  This group (and TAG) will provide guidelines for others to follow Outside scope of GUID system: Relationships between objects Query on other properties Indexing services and warehouses Discovery and harvest of data and metadata, etc