A logical attribute name is an index into the system logical attribute array. When a logical attribute is encountered, Vermont Views uses the physical attribute or terminal attribute code in the appropriate position in the array. Since the array is already initialized to be specific to the current type of video display and the current operating system, the use of logical attributes is completely portable.
Table 46.1 gives the logical attribute definitions for PCDOS, OS/2, and terminals running on a memory-mapped display. Table 46.2 gives the logical attribute definitions for non-memory-mapped terminals running under UNIX, XENIX, POSIX and VMS.
In general, logical attributes are named and defined by their purpose. For example, some of the pre-defined logical attributes of Vermont Views are LFLDACT, LFLDINACT, LERROR, and LMESSAGE. LFLDACT, for example, is used to display an active data field. To change the color of all active data fields in your application, you simply need to change the color definition for LFLDACT.
Table 46.1: Logical Attribute Definitions for PCDOS, OS/2, and Memory-Mapped Output
| Logical Attribute | Monochrome Attribute | Color Attributes Foreground/Background |
| LSYS | Normal | White on Black |
| LNORMAL | Normal | White on Blue |
| LREVERSE | Reverse | Blue on White |
| LHIGHLITE | High intensity | Bright White on Blue |
| LURGENT | Blinking, high intensity | Blinking Red on Black |
| LHELP | High intensity | Blue on White |
| LERROR | Reverse | Red on Black |
| LMESSAGE | High intensity | Bright White on Blue |
| LFLDINACT | High intensity | Cyan on Blue |
| LFLDACT | Reverse | Black on Cyan |
| LFLDSKIP | Normal | Black on White |
| LMNINACT | High intensity | Cyan on Blue |
| LMNACT | Reverse | Black on Cyan |
| LMNUNAVAIL | Normal | Black on White |
| LFLDSELCH | Reverse | Black on Cyan |
| LCLINACT | High intensity | Black on Green |
| LCLACT | Reverse | Green on Black |
| LMARK | Reverse | Blue on White |
| LNODISPLAY | No display | Blue on Blue |
| LARROW | Reverse | White on Black |
| LCORNER | Normal | White on Blue |
| LPAGERGN | Normal 1 | White on Black |
| LTHUMB | Reverse 2 | Black on White |
| LSHADOW | Normal | White on Black |
| LDEBUG | Reverse | Bright White on Red |
| LDEBUGMSG | High intensity | Red on White |
| LSPINCH | Normal | White on Blue |
1 Reverse for memory-mapped displays
2 Normal for memory-mapped displays
Table 46.2: Logical Attribute Definitions for UNIX, XENIX, POSIX and VMS
| Logical Attribute | Monochrome Attribute* | Color Attributes* |
| LSYS | NORMAL | COLOR9 |
| LNORMAL | NORMAL | COLOR10 |
| LREVERSE | REVERSE | COLOR11 |
| LHIGHLITE | HIGH_INT | COLOR12 |
| LURGENT | BLINK | COLOR13 |
| LHELP | HIGH_INT | COLOR11 |
| LERROR | REVERSE | COLOR14 |
| LMESSAGE | HIGH_INT | COLOR12 |
| LFLDINACT | HIGH_INT | COLOR15 |
| LFLDACT | REVERSE | COLOR16 |
| LFLDSKIP | NORMAL | COLOR15 |
| LMNINACT | HIGH_INT | COLOR15 |
| LMNACT | REVERSE | COLOR16 |
| LMNUNAVAIL | NORMAL | COLOR15 |
| LFLDSELCH | REVERSE | COLOR16 |
| LCLINACT | HIGH_INT | COLOR12 |
| LCLACT | REVERSE | COLOR11 |
| LMARK | REVERSE | COLOR11 |
| LNODISPLAY | INVISIBLE | INVISIBLE |
| LARROW | REVERSE | COLOR9 |
| LCORNER | NORMAL | COLOR10 |
| LPAGERGN | REVERSE | COLOR9 |
| LTHUMB | NORMAL | COLOR15 |
| LSHADOW | NORMAL | COLOR9 |
| LDEBUG | REVERSE | COLOR5 |
| LDEBUGMSG | HIGH_INT | COLOR1 |
| LSPINCH | NORMAL | COLOR10 |
* The actual attributes displayed depends on the vvtermcap entry defined for the monochrome and color attribute values.
