1. WHO-CEHA Inter-Water Thesaurus and other WHO Sources for Health and Environment Terminology Mazen Malkawi Technical Information Officer WHO/EMRO/CEHA

2. CEHA Regional Centre for Environmental Health Activities Established in 1985 in Amman, Jordan by the WHO Regional Office for the Eastern Mediterranean EMRO Its Mandate is to promote Environmental Health through technical support for national capabilities and programmes in the Member Countries of the Region For more details http://emro.who.int/cehahttp://emro.who.int/ceha

3. Eastern Mediterranean Region (EMR) Sudan Egypt Saudi Arabia Yemen Oman I.R. Iran Pakistan Lebanon Jordan Syria UAE Kuwait Libya Morocco Tunisia Somalia Afghanistan Djibouti Iraq BAA QAT

4. CEHANET Regional Environmental Health Information Network established by CEHA in 1988 in collaboration with the International Development Research Centre (IDRC). Mandate is to improve access to reliable and relevant environmental health information in the Region

5. CEHANET Approaches Regional EH Information Centre and Information Services Development of Information Systems and Tools Production of Regional and National Information Human Resources Development Establishment of EH Information Centres For details http://www.emro.who.int/ceha/cehanet.asp http://www.emro.who.int/ceha/cehanet.asp

6. CEHA Inter-Water Thesaurus Based on the IRC Inter-water Thesaurus for Community Water Supply and Sanitation It is a controlled and structured vocabulary for use in indexing, storage, and retrieval of information Bilingual English/Arabic Includes 2200 descriptors and about 1000 non- descriptors Based on printed version as mostly its users are small size information centres that are using CDS/ISIS. Electronic version is available for larger centres using Mini-ISIS

7. Thesaurus Structure Presentation is alphabetical and incorporating both descriptors and non-descriptors in one sequence Each entry (word block) contains all available details including all relationships Each block gives the whole hierarchy of the descriptor both at superordinate and subordinate levels for up to seven levels The Arabic equivalent of the top term in the word block is presented Subject categories (facets) have also been added to the top term to indicate the term’s affiliation

8. Thesaurus Subjects A Water Supply –A1 Water Resources –A2 Water Treatment B Water Quality C Water Use D Water and Wastewater Transport E Sanitation –E1 Wastewater Treatment –E2 Waste Disposal and Utilization F Health –F1 Environment –F2 Food

9. Thesaurus Relationships Equivalence (Synonyms) It indicates that one term from among a number of synonyms has been selected as descriptor while the others are considered non-descriptors Hierarchical (Broader and Narrower) Multiple levels have been used to indicate hierarchical levels (4 broader and 4 narrower) Related (Associative) Scope Notes are added to some descriptors to define, explain or limit the term

10. Thesaurus Maintenance As the thesaurus updating is of utmost importance equal to its construction, CEHA has decided to cooperate with IRC and its Focal Points in the Region on this Regard. Users were requested to send their suggestions for addition, deletion or modification to CEHA for centralization of the updating process Special form was used for this purpose. There are suggestions for adding about 400 descriptors

11. Other Supporting Tools Subject Analysis Handbook CEHANET Procedures Manual Training course on EH information Networking The above tools were used for training about 100 trainers and 300 users in the Region

12. Unified Medical Dictionary The Unified Medical Dictionary (UMD) is a Multilingual Medical Dictionary (Arabic, English, French, German, Spanish). Includes more than 150,000 terms with an update facility Available in Printed, on CD-ROM and through Internet http://emro.who.int/umd http://emro.who.int/umd Includes several specialized dictionaries and CEHA is looking for support to finalize its EH one

13. Medical Subject Headings (MESH) It is the system designed and used by the National Library of Medicine (NLM) for assigning subject headings to books and journals articles in the medical sciences. It is available in Arabic Looking for Collaborators to expand the Environmental Health part