VHDL Issue Number:      0215
Classification:         Language Deficiencies and Modeling Problems
Language Version:       VHDL-87
Summary:                Library Std should contain only 1076-standard units.
Related Issues:         None.
Relevant LRM Sections:  11.2
Key Words and Phrases:  Library Std, standard packages
Current Status:         Submitted
1076-1993 Disposition:  Closed (All Issues Completely Addressed)
Disposition Rationale:  Section 11.2 has been revised to remove the note 
                        and add normative text.
Superseded By:          N/A
-----------------------
Date Submitted:         1991/03/20
Author of Submission:   Paul Menchini
Author's Affiliation:   CAD Language Systems, Inc.
Author's Post Address:  P.O. Box 13036
                        Research Triangle Park, NC  27709-3036
Author's Phone Number:  (919) 361-1913
Author's Fax Number:    
Author's Net Address:   mench@clsi.com
-----------------------
Date Analyzed:          TBD
Author of Analysis:     TBD
Revision Number:        $Revision: 1.7 $
Date Last Revised:      $Date: 1995/05/13 19:34:42 $


Description of Problem
----------------------
Paragraph 6 of Section 11.2 (on page 11-2) states (in part):

        Library logical name STD denotes the design library in which
        package STANDARD and package TEXTIO reside; these are the only
        standard packages defined by the language (see Chapter 14).

The second note of the same section (on page 11-3) states:

        It is recommended that library STD contain only those library
        units that correspond to design units defined as part of the
        Language Reference Manual.  This set of units  may change over
        time as the language evolves; however, portability of designs
        will be enhanced if, for any given version of the language,
        library STD contains a known set of library units.

This recommendation should be strengthened into a prohibition, as the
explanatory text is correct; portability is degraded by the presence of
different units in different implementations.


Proposed Resolution
-------------------
Change the first quoted passage to read:

        Library logical name STD denotes the design library in which
        the standard packages defined by the language reside (see
        Chapter 14); these are the only library units which may reside
        in this library.

and delete the second note.  Optionally, the second note could be changed to:

        Currently, package STANDARD and package TEXTIO (see Sections
        14.2 and 14.3, respectively) are the only standard packages
        defined by the language.


VASG-ISAC Analysis & Rationale
------------------------------
TBD


VASG-ISAC Recommendation for IEEE Std 1076-1987
-----------------------------------------------
TBD


VASG-ISAC Recommendation for Future Revisions
---------------------------------------------
TBD