International Organization for Plant Information

A Taxonomic Information Model for Botanical Databases. Draft version 7.3

Compiled by W. Berendsohn, Botanical Garden and Botanical Museum Berlin-Dahlem, for the IOPI Information System Committee (List of members).

Please note: With the exemption of chapters 7 (reference citations) and 10 (geographic distribution), this draft has been superceded by a published version (Taxon 46:283-309) .



Data models; Scope of the Model; History of the model; CASE techniques in data modeling and system development

Glossary of Terms and Concepts

A brief explanation of terms and graphical elements used in the model

1. Potential taxa

Linking information to plant names; Entity-Relation model of potential taxa; Integrity rules for potential taxon definitions

2. Botanical names

Data elements in botanical names; Realization of botanical names in the data model; Name rank; Name structure; Binomials and trinomials; Microspecies, Aggregates, „sensu lato"; Cultivars; Hybrids and hybrid formulas; Unnamed taxa; Entity relation model of botanical names; Specific integrity rules for plant names; Taxonomic reference citations

3. Referenced status assignations: From name to potential taxon and synonym

System status; Nomenclatural status; Basionomy; Homonyms; Synonyms; Specific integrity rules related to the system status

4. Classification

Alternative taxonomies; Systematic sequence; Entity Relation model of the classification of potential taxa; Specific integrity rules for classifications

5. The "preferred taxon view"

Shielding users from taxonomy and nomenclature

6. Persons and person teams

Integrity rules

7. Reference citations

Non-standard features of taxonomic source references; Entity Relation model of reference citations


Structuring unstructured information

9. Indirectly linked plant information

Basic design criteria; Linking information to taxa

10. Geographic distribution in the IOPI Checklist

Scope of the model; Attachment to potential taxa; The data structure; Summary range phrase; Area occurrence data; The entity relation model for geographic distributions in the IOPI checklist

11. Alphabetical list of entities with attributes and data elements

The data dictionary, after all


Literature cited

Next chapter; Contents of this article; Complete entity list; References cited; Author information. Last updated: June 23, 1995; supplemented Nov. 1997.