Z39.50 An ANSI protocol standard for WAN (wide area network) information query and exchange to share library referencing requests via distributed electronic access to information.
Spatial Database Catalogs and Libraries are implemented through use of a consistent index and search strategy based on the Hyper-Text Transfer Protocol (HTTP) and Z39.50 Search and Retrieve protocols.
The development of DIAL system is a on-going process. The fully-developed DIAL system will consist of: 1) a catalog interoperability layer to support major protocols, such as Z39.
[edit] Catalog Servers
Name As a server As a client Z39.50 CSW 2.0 OAI-MPH OpenSearch OpenSearch GEO RSS GeoRSS WebDav Z39.50 CSW 2.0 OAI-MPH OpenSearch OpenSearch GEO RSS GeoRSS WebDav GeoNetwork
Yes
Yes ...
FGDC and ISO 19115 metadata standards
Harvesting from ArcIMS, Z39.50, OAI, and WAF based metadata repositories
OpenGIS WFS, WMS, and WCS services through the map viewer
ArcIMS Image and ArcGIS Image Server
OpenLS geocoder ...
 See also: Access, GIS, Interface, Information, Metadata
  
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