Czech Republic ISIL Database Analysis

Source Information

Authority: National Library of the Czech Republic (Národní knihovna České republiky)
Database: ADR (Adresář knihoven a informačních institucí v ČR)
Download URL: https://aleph.nkp.cz/data/adr.xml.gz
License: CC0 (Public Domain)
Format: MARC21 XML
File Size: 27 MB (decompressed), 1.9 MB (compressed)
Last Updated: Generated weekly (each Monday)
Download Date: November 19, 2025

Database Statistics

Total Records: 8,145 institutions
Coverage: All types of libraries and information centers in Czech Republic
- National libraries (NK)
- Academic libraries
- Public libraries
- Special libraries
- Archives
- Museums with library collections

Data Structure (MARC21 Custom Fields)

Key Fields:

SGL: Sigla (Library Code) - equivalent to ISIL identifier
NAZ: Name of institution (3 levels: main/department/division)
VAR: Name variants (Czech and foreign language)
TYP: Institution type
ADR: Address (street, postal code, city, GPS coordinates)
MES: City/municipality
KRJ: Region and district
ICO: Company registration number (IČO and DIČ)
TEL: Telephone
EML: Email
URL: Website URLs (main site, catalogs, databases)
JMN: Contact persons with titles and roles
OTD: Opening hours (by day of week)
FND: Collection size (books, periodicals, other materials)
KNS: Library system software used

Institution Types (TYP field):

According to documentation, includes various codes for:

NK: National library
VK: Academic library
SVK: Regional library
MK: Municipal library
OPVK: Specialized public library
And many more types

Sample Records

Record 1: National Library of Czech Republic

Sigla: ABA000
Name: Národní knihovna České republiky
English Name: National Library of the Czech Republic
Type: NK (National library)
Founded: 1602
Address: Mariánské náměstí 190/5, 110 00 Praha 1
GPS: 50°5'11.12"N, 14°24'56.61"E
Phone: 221 663 111
Website: https://www.nkp.cz
Director: Mgr. Tomáš Foltýn (generální ředitel)
Collections: 6,919,075 volumes, 10,449 periodical titles (2015)
System: ALEPH

Data Quality Assessment

Strengths:

✅ Comprehensive coverage of Czech institutions
✅ Rich metadata (GPS coordinates, opening hours, collection statistics)
✅ Multiple contact methods (phone, email, web)
✅ Hierarchical institution structure (departments, branches)
✅ Available as open data (CC0 license)
✅ Regular updates (weekly)
✅ Well-documented structure

Limitations:

⚠️ Custom MARC21 format (not standard MARC21 bibliographic)
⚠️ Documentation primarily in Czech
⚠️ Library codes (siglas) are not standard ISIL format (CZ-XXXXX)
⚠️ Some records may lack ISIL codes entirely

Conversion Requirements

To integrate with GLAM project:

Parse MARC21 XML structure
Map SGL (sigla) codes to ISIL format (CZ-[sigla])
Extract institution types and map to GLAMORCUBESFIXPHDNT taxonomy
Geocode addresses (GPS already provided!)
Handle Czech-specific metadata (IČO, regional structure)
Create LinkML-compliant records with provenance

ISIL Code Investigation

The database uses "siglas" (library codes) like:

ABA000 - National Library
ABA001 - National Library - Library Services Division
etc.

These are NOT standard ISIL codes (format: CZ-XXXXX). Need to:

Check if there's a mapping between siglas and official ISIL codes
Contact NK ČR for clarification on ISIL code assignment
Potentially cross-reference with ISO 15511 registry

Next Steps

✅ Download complete database (DONE)
⏳ Parse MARC21 XML to extract all institutions
⏳ Map institution types to GLAM taxonomy
⏳ Geocode addresses (GPS coordinates already available)
⏳ Generate LinkML-compliant YAML instances
⏳ Cross-reference with official ISIL registry
⏳ Validate data quality and completeness

Additional Resources

Database structure: https://www.caslin.cz/caslin/databaze-pro-vyhledavani/adresar/struktura-baze-adr
Search interface: https://aleph.nkp.cz/F/?func=file&file_name=find-b&CON_LNG=ENG&local_base=adr
Open data page: https://www.nkp.cz/en/about-us/professional-activities/open-data

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