ORDHIR Order Message for Hire Working - Eurofer

UN/EDIFACT D93.A ORDHIR - Order message for hire working
1. DATA MODEL
1.1 Data Model Format
The data model of this order message has been created based on the global data model
for hire working and is based on the information requested by the European Steel
industry for ordering hire working activities.
The data model has been created, to make it possible for the potential users to
understand the Eurofer subset for the Order message for hire working. This data
model gives the following information :
- contents of the information (data elements) that can occur in the messages,
- relationships between the different data elements,
- grouping of the data elements in data entities,
- and relation between data entities.
To simplify the understanding of the data model, the model is defined at a summary
level, specifying when necessary a group of data elements instead of each data
element.
The data model consists of data entities, the relationships between those data entities
and the attributes (data elements) in each data entity.
An entity specifies an object against which information is held, it has a name, a
description and attributes.
An attribute describes a unique characteristic (information which can appear on the
order sheet), it has a name, a description and a value.
The relationships of the data entities within the data model are reflected in the
structure of the diagram in chapter 1.2.
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