SKEY Attributes

Elements used to define reference datums must have an SKEY attribute, or a parent with an SKEY attribute (but note that the parent element need not be the immediate owner of the element). If the element does not have an SKEY, and no parent has an SKEY, miscellaneous SKEY types (see below) will be used.

Elements with SKEY attributes are:

• Datums

• Equipment

• Pipes

• Structures

• Substructures

• Drawings

• Frameworks

• Subframeworks

Different SKEY types have different ATEXTs associated with them, as shown in the following table.

In SKEY Types above, the symbol * represents any character. In Default texts, $ is replaced by a new line and ? is replaced by the name of the element. If the element does not have a name, Isodraft looks up the hierarchy until it finds a parent with a name, and then uses that parent’s name.

If the reference element is a Datum element, it will have an STEXT attribute. The user can set this attribute to any identification text required. If the user does this, the text they enter is used instead of the name. If the user leaves STEXT unset, the Datum name is used.

Set the SKEY text to the SKEY type required. Note that the user can also redefine the text in the ATEXT element using the ATEXT command.

For example:

Pipe PIPE7-1 has an SKEY type VSTC. Associated with the pipe is ATEXT 464, with default text CL PIPELINE $?. The following text will appear on the isometric (see the Example plot file image):

CL PIPELINE

PIPE7-1

The Example plot file image also shows a reference to a Datum, which has its STEXT element set to Zero Elevation.

Example plot file