655e (Catalogue enrichment)

Field number

655

Indicator

e

Repeatable

max. 5

Content

Address of an electronic resource or of the catalogue enrichment

MARC21

856 (external site) 42 $u

1st subfield: $u

Subfield $u holds the electronic address of an electronic resource (a link) as a URL (Uniform Resource Locator), the standardised format for addressing resources in computer networks. It is made up as follows:

1. the protocol (http:// or file://),
2. the name of the server (for example www.ibtc.de); for local files this part stays empty (""),
3. the separator /, and
4. the name of the electronic resource including its absolute path (for example pub/sbc.pdf or c:/dokumente/sbc.pdf).

Protocol:

http:// — reference to an electronic resource on a web server.

file:// — reference to a local electronic resource, normally a file.

References to a local file always use absolute paths (for example c:/dokumente/sbc.pdf) and never relative ones (for example ../dokumente/sbc.pdf). Directories are marked with the ordinary slash /, not with the backslash \ as under DOS and Windows — even where the local machine runs DOS or Windows.

2nd subfield: $3

Subfield $3 holds what the link refers to (max. 30 characters), from this list. The values are stored in German exactly as given here:

Examples

$uhttp://www.ibtc.de/pub/sbc.pdf$3Volltext
$ufile:///c:/dokumente/sbc.pdf$3Volltext

Notes

• For full text, the title proper (331) should end with "[Elektronische Ressource]".
• For electronic resources that are not local, it is advisable to record the date the link was checked in the note (501): "Gesehen am: xx.xx.xxxx".