Attributes

Database Management Reference Manual

Attributes

Attribute Types

Attributes can be the following types:

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Bool (or Logical)

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String (or Text)

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This is a pointer to another element by storing its internal database reference (as Integer(2) array)

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This is a special form of Real(3) array containing 3 distances

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This is a special form of a Real(3) array

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This is a special form of a Real(3) array

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This a character string of up to either 4 or 6 ASCII upper case character string stored as an integer which is often interpreted either as an enumerated value or as a user readable name. Words are used for the simple names and for many enumerated integer values. They are often called hash codes.

If more than 4 (or 6) characters are entered only the first ones will be used, but without generating an error. Lower case characters will be converted to uppercase, and non ASCII unicode characters will be ignored. The word cannot contain a space. The space is one of the characters that will automatically delimit the string.

Different attributes are limited to either 4 or 6 characters, although attribute and element type names do have up to 6. Whether 4 or 6 are allowed is an implementation issue and the older attributes existing in originally introduced in earlier databases tend to be limited to 4 characters.

Examples of their use are TYPE of elements and attributes.

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Modifier attributes (JUST = TOP, BOT)

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Pline names
Unit field of real attributes and dimension setting attributes (PTYPE = DIST, BORE, NONE etc)

Attributes may also be arrays of simple attributes Those supported are:

Bool (or Logical) Array

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