# Presentation: 334303

## Z39.50 Maintenance Agency

- http://lcweb.loc.gov/z3950/agency/
- rden@loc.gov

## Maintenance
Development
Registration
Implementor Information

- Development
- Registration
- Implementor Information

## Formal Standards Maintenance

- Defect Reports
- Amendments
- New versions

## Z39.50-1995 Defect Report Z39.50MA-DR0001: Close Reason

- February 1999
- Defect Report Number: **Z39.50MA-DR0001**
**Source** of Report: Bob Waldstein
- Report Concerning: **Close Service**
- Type of Defect: **Editorial**
- Reference in Document: 3.2.11.1.1 and ASN.1
**Nature of Defect**: There is a reason of 'response
- to Close request'. But in the ASN, value 8 is 'peerAbort'.
**Solution Proposed**:
- Change 'peerAbort' to 'responseToPeer' in ASN.1.
**Status**/Secretariat Response:
-      June 1998: Endorsed by ZIG.
-      January 1999: Circulated for review to SC 4 members;
- comments due April 30, 1999.

##                                    Encapsulation 

-                                    Encapsulation
*Amendment Number*:** Z39.50MA-AM0001 **
*Original Date*:** 1/97   ***Modified*: **5/99.**
*Amendment*: This amendment designates option bit 15
- for encapsulation, defined as follows.
-    1.Encapsulation is negotiated during initialization.
-  Option bit 15 is designated.
-  If the client sets option bit 15 in  the Init request, then:
-           The client proposes that "encapsulation be in effect”......
*Status*: This proposed amendment had been tabled, 6/98;
- it has now been modified and will be considered at the
- August 1999 ZIG meeting.

## Formal Standards Maintenance

- Defect Reports
- Amendments

## Informal Maintenance

- Clarifications
- Commentaries
- Implementor Agreements

## Z39.50 Clarifications

- Clarifications Pending Approval
-  Approved:
-    1.Present request out-of-range
-    2.Explain element maxTerms
-    3.Partial Search Results
-    4.SUTRS and InternationalString
-    .
-    .
-   **54.Keyword Searching of Bibliographic Systems**
-   55.Ascending and Descending by "frequency" in Sort
-   56.Single-PDU, Multi-database Searching -- Status

## Keyword Searching of Bibliographic Systems 

*Issue raised by*: Fay Turner
*Synopsis*:
-  Keyword searching of bibliographic systems is useful when neither the
- exact author, title or subject of  an item is known, or when the objective
- of the search is to identify a broad range of documents to which the
- keywords apply. Characteristics of keyword searching include:
-           Searching one or more words that do not have to be in any order.
- ...........
**What combination of bib-1 attributes should be used **
**to specify a keyword search? **

- For bibliographic system searching, queries where all operands
- are constructed as follows are to be interpreted as keyword searches:
-           *Position*: any-position-in-field (3) or absent
-           *Relation*: equal (3) or absent
-           *Completeness*: incomplete-field (1) or absent
-           *Structure*: word (2)
-           *Truncation*: absent or as supported by the server
-                for keyword searching
-           *Use*: as supported by the server for keyword searching
-                 (including ANY, if supported).
-           *Term*: a single word
- Status: Approved 3/99

- Response:

## ZIG Commentaries

- Pending Comentaries
- Approved:
-    1. Explain Term Lists
-    2. REAL in GRS-1
-    3. Non-scanable term-lists
-    .
-    .
-    .
-   14. Schema Identifier
-   15. **Delete **
-   16. Support for Single-PDU, Multi-database Searching

*Question from:* Claudia Rolker rolker@fzi.de
- Tue, 28 Jul 1998 14:26:06 +0200
-      What is the purpose of the Delete Service?
- Result sets are deleted automatically after the z-association
-  is closed. When would it make sense to delete results
- during a z-association?

- Delete

*    *
- Servers often have a limit to the number of named result
-      sets they can store. A server may unilaterally
-      delete a result set, particularly when the limit is reached.
-      So it makes good sense for a client to delete a
-      result set it no longer needs, to forestall the possibility
-     that a result set that it does still need may be
-      unilaterally deleted.
-      Some servers charge to maintain results, so deleting
-      a result set as soon as it is no longer needed may
-      help reduce cost.
*Status*: Approved (10/98)

- Response:

## Z39.50 ImplementorAgreements    

*Pending* Agreements
*Approved:*
-    1.Linear Range Searching
-    2.Message Size Negotiation
-    3.Bib-1 Attribute Set Semantics
-    4.Use of Init Parameters for Negotiation
-       and User Information
-    5.Returning Diagnostics in an Init Response
-    6.**Free-Form Human-entered-Text Search**
-    7.Embedding MARC in a GRS-1 Record

## Free-Form Human-entered-Text Search 

- A free-form human-entered-text search, using the bib-1 attribute set
- consists of an operand constructed as follows:
-    1.Use: any bib-1 Use attribute
-    2.Relation: Relevance
-    3.Position : must be omitted
-    4.Structure: Free form text
-    5.Truncation : must be omitted
-    6.Completeness : must be omitted
- Term: free-form human-entered-text-string

## Registry of Z39.50 Object Identifiers

- Attribute Sets
- Diagnostic Sets
- Record Syntaxes
-  Extended Services
-  User Information Formats
-   Element Specification Formats
-  Schemas   *(etc.)*

## Attribute Sets

- Object Identifier    Name     Usage                     Reference
- 1.2.840.10003.3.1      bib-1        bibliographic           Appendix 3 (ATR)
- 1.2.840.10003.3.2      exp-1       explain                     Appendix 3 (ATR)
- 1.2.840.10003.3.5      gils          locators                     GILS profile
-  1.2.840.10003.3.6     stas        scientific/technical      CNIDR
- 1.2.840.10003.3.8    cimi-1   museum collection info  CIMI Profile
- 1.2.840.10003.3.9    geo-1    geospatial metadata      GEO Profile

## Register of Implementors  
 Hosts Available for Testing 
 Z39.50 Projects 
 Z39.50 Software 
Profiles
Bibliography, etc.
The Z39.50 Text

- _[ Hosts Available for Testing ](http://lcweb.loc.gov/z3950/agency/register/testport.html)_
-  Z39.50 Projects
-  Z39.50 Software
- Profiles
- Bibliography, etc.
- The Z39.50 Text

## The ZIG

## Slide 20