What is a regular Attribute?

An Attribute is some descriptive property of a Definition. It differs from Core Attributes, which are described in the next section. For example, when talking about the definition "Car", we might have several properties which can be recorded, including "Colour", "Size", "Horsepower", "Engine Displacement", "Owners", etc. Within the DMO, the most common attribute is a small piece of text (typically not larger than 250 characters in length), however there are many possible data types of attributes, which are listed below:

Table 1. Table of Definition Attribute Data Types

Attribute TypeDescription
Text LineThis can be a single line of text, in any language. Typically no more than 250 characters in length.
BooleanThis requires a choice between True and False.
Large TextThis is a text area, which might have up to 65,000 characters in length. Of particular interest is the fact that multiple versions of this may exist, in different languages, for the same attribute.
FileFor large documents, images or virtually any type of file, this attribute allows a file attachment to be assigned to a definition. Multiple files may be attached, but only if each attribute has a different name (see basic rules below.)
InstanceThis is a powerful feature of the DMO, which allows any single instance to be made into an attribute for any other instance (except itself.)
UserAny person information stored in the LFXlib may be selected as an attribute for an instance.
GroupAny group information stored in the LFXlib may be selected as an attribute for an instance.
SelectThis attribute allows selection from among a limited set of choices, which are presented in a pull-down list.
URL LinkThe attribute will be treated as a URI, which allows selection of any Web page or other Internet-related media selector.
Helpdesk Escalation PresetThis is a specialized attribute which only applies when DMO is used with the LFX Process Desk, to specify what escalation preset should be used to apply to incidents that are created based on an object instance with this attribute.

There are several basic rules about Attributes which must be observed:

Attributes themselves may have some options, besides their type. These options are:

Table 2. Attribute Options

VisibleThis defines whether the attribute will be shown in forms which are presented to the user. Some attributes are for internal or program use only, and do not need to be displayed.
Is PasswordWhen presented in a form, the contents of this attribute will be masked from the user. This is typically required for passwords, community strings or other sensitive information. Note that in the underlying database, this information is not hashed or otherwise encoded; this option only applies to the presentation layer.
RevisionThis is a simple number which is incremented each time the attribute is changed.
InheritableThis is NOT related to the inheritance of attributes by one definition from its parent definition. Instead, it means that whenever this attribute is assigned a value, it will be copied (both the attribute AND the value) to all of the Instances that exist as child instances of the current instance. This is typically used for attributes such as Security Classification.
DescriptionThis is text which appears whenever an attribute is to be added or changed, as a guide to the user.