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BIRD ID#:        102
ISSUE TITLE:     File Name Limit Extension
REQUESTER:       Michael Mirmak, Intel Corp.
DATE SUBMITTED:  January 8, 2006
DATE REVISED:    
DATE ACCEPTED BY IBIS OPEN FORUM: February 17, 2006

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STATEMENT OF THE ISSUE:

Some company-internal design tools may create files that exceed the current 24
character limit on IBIS filenames (20 characters + one period + three
character extension).

With the BIRD93.1 extended limits on model and signal names, plus support
for extended filenames under modern computer operating systems, filenames may
also be safely extended.

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STATEMENT OF THE RESOLVED SPECIFICATIONS:

Changes are noted in the relevant sections below by |* lines.

Replace the following text, in Section 3 General Syntax Rules and Guidelines:

3)  To facilitate portability between operating systems, file names used in
|     the IBIS file must only have lower case characters.  File names should
|     have a basename of no more than twenty characters followed by a period
|     ('.') , followed by a file name extension of no more than three
|     characters.  The file name and extension must use characters from the
|     set (space, ' ', 0x20 is not included):
|
|         a b c d e f g h i j k l m n o p q r s t u v w x y z
|         0 1 2 3 4 5 6 7 8 9 _ ^ $ ~ ! # % & - { } ) ( @ ' `
|  
|     The file name and extension are recommended to be lower case on
|     systems that support such names.

with:

3)  To facilitate portability between operating systems, file names used in
|     the IBIS file must only have lower case characters.  File names should
|*     have a basename of no more than forty (40) characters followed by a period
|     ('.') , followed by a file name extension of no more than three
|     characters.  The file name and extension must use characters from the
|     set (space, ' ', 0x20 is not included):
|
|         a b c d e f g h i j k l m n o p q r s t u v w x y z
|         0 1 2 3 4 5 6 7 8 9 _ ^ $ ~ ! # % & - { } ) ( @ ' `
|  
|     The file name and extension are recommended to be lower case on
|     systems that support such names.

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ANALYSIS PATH/DATA THAT LED TO SPECIFICATION

At least two semiconductor vendors have recently noted that their internal 
file naming conventions exceed the IBIS 24 character limit.  Further, some
IBIS file creation tools include a single model which, under BIRD93.1, 
can use names up to 40 characters in length.


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ANY OTHER BACKGROUND INFORMATION:

It was noted at the February 17, 2006 meeting that BIRD102 applies to all
.ibs, .pkg and .ebd files.

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