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SEMI P39-0304 E2 © SEMI 2004 16 17.2 propnam e-string is an n-string which holds the pr operty name. The reference-number is an unsigned- integer which is either implicitly or exp licitly assigned to the property na me. …

SEMI P39-0304

15 CELLNAME Record

15.1 A CELLNAME record associates the name of a cell with a unique reference number. This allows CELL and

PLACEMENT records, if desired, to avoid redundantly storing the actual text of the cell name and instead refer to

the cell by its assigned reference number. It has the following format:

‘3’ cellname-string

‘4’ cellname-string reference-number

15.2 cellname-string is an n-string which holds the cell name. The reference-number is an unsigned-integer

which is either implicitly or explicitly assigned to the cell. Implicit assignment occurs in record type ‘3’, by

assigning sequential reference numbers beginning with 0 as each successive CELLNAME record is encountered.

Explicit assignment occurs in record type ‘4’.

15.3 Two standard properties, S_BOUNDING_BOX and S_CELL_OFFSET (described in Section A2-2 on page

36), may be associated with each CELLNAME record. When all CELLNAME records have been grouped into a

single contiguous table in strict mode (as described in Section 13 on page 13), with an S_CELL_OFFSET property

for every CELLNAME record, the table forms a complete index of all cells in the OASIS file, suitable for random

access.

15.4 Record types ‘3’ and ‘4’ may not both be used in the same OASIS file.

15.5 EXCEPTION HANDLING

— The appearance of two CELLNAME records in the same file with the same

number but different names, or two CELLNAME records in the same file with the same name but different

numbers, should be treated as a fatal error. The appearance of both record types ‘3’ and ‘4’ in the same OASIS file

should be treated as a fatal error. The presence of more than one S_CELL_OFFSET or S_BOUNDING_BOX

property after a given CELLNAME record should be treated as a fatal error.

16 TEXTSTRING Record

16.1 A TEXTSTRING record associates a text string with a unique reference number. This allows TEXT records,

if desired, to avoid redundantly storing the actual text of the string and instead refer to the string by its assigned

reference number. It has the following format:

‘5’ text-string

‘6’ text-string reference-number

16.2 text-string is an a-string which holds the text string. The reference-number is an unsigned-integer which is

either implicitly or explicitly assigned to the text string. Implicit assignment occurs in record type ‘5’, by assigning

sequential reference numbers beginning with 0 as each successive TEXTSTRING record is encountered. Explicit

assignment occurs in record type ‘6’.

16.3 Record types ‘5’ and ‘6’ may not both be used in the same OASIS file.

16.4 EXCEPTION HANDLING

— The appearance of two TEXTSTRING records in the same file with the same

number but different names, or two TEXTSTRING records in the same file with the same name but different

numbers, should be treated as a fatal error. The appearance of both record types ‘5’ and ‘6’ in the same OASIS file

should be treated as a fatal error.

17 PROPNAME Record

17.1 A PROPNAME record associates the name of a property with a unique reference number. This allows

PROPERTY records, if desired, to avoid redundantly storing the actual text of the property name and instead refer

to the property name by its assigned reference number. It has the following format:

‘7’ propname-string

‘8’ propname-string reference-number

SEMI P39-0304

17.2 propname-string is an n-string which holds the property name. The reference-number is an unsigned-

integer which is either implicitly or explicitly assigned to the property name. Implicit assignment occurs in record

type ‘7’, by assigning sequential reference numbers beginning with 0 as each successive PROPNAME record is

encountered. Explicit assignment occurs in record type ‘8’.

17.3 Record types ‘7’ and ‘8’ may not both be used in the same OASIS file.

17.4 EXCEPTION HANDLING

— The appearance of two PROPNAME records in the same file with the same

number but different names, or two PROPNAME records in the same file with the same name but different

numbers, should be treated as a fatal error. The appearance of both record types ‘7’ and ‘8’ in the same OASIS file

should be treated as a fatal error.

18 PROPSTRING Record

18.1 A PROPSTRING record associates a property string with a unique reference number. This allows

PROPERTY records, if desired, to avoid redundantly storing the actual text of the property string and instead refer

to the property string by its assigned reference number. It has the following format:

‘9’ prop-string

‘10’ prop-string reference-number

18.2 prop-string is an a-string, b-string , or n-string which holds the property string, depending on the referencing

PROPERTY record. The reference-number is an unsigned-integer which is either implicitly or explicitly assigned

to the property string. Implicit assignment occurs in record type ‘9’, by assigning sequential reference numbers

beginning with 0 as each successive PROPSTRING record is encountered. Explicit assignment occurs in record

type ‘10’.

18.3 Record types ‘9’ and ‘10’ may not both be used in the same OASIS file.

18.4 EXCEPTION HANDLING

— The appearance of two PROPSTRING records in the same file with the same

number but different names should be treated as a fatal error. The appearance of both record types ‘9’ and ‘10’ in the

same OASIS file should be treated as a fatal error.

19 LAYERNAME Record

19.1 A LAYERNAME record provides a means of mapping numeric (layer,datatype) and (layer,texttype)

combinations to layer names. It has the following format:

‘11’ layername-string layer-interval datatype-interval

‘12’ layername-string textlayer-interval texttype-interval

19.2 Record type ‘11’ maps a range of (layer,datatype) numbers to a layer name, and record type ‘12’ maps a range

of (textlayer,texttype) numbers to a layer name.

19.3 layername-string is an n-string containing the layer name.

19.4 Each of the interval fields consists of an unsigned-integer denoting the interval type, followed by 0, 1, or 2

unsigned-integers representing the bounds of that interval as follows:

Table 13 LAYERNAME Interval Types

Type Bounds Implied Range

0 to  

bound-a

0 to bound-a

bound-a

bound-a to 

bound-a bound-a

bound-a bound-b

bound-a to bound-b

SEMI P39-0304

19.5 LAYERNAME records may be repeated for the same layer name. The complete mapping for a layer name is

formed by the union of all layer, datatype, textlayer, and texttype ranges associated with that name.

20 CELL Record

20.1 A CELL record introduces a cell definition. It has the following format:

‘13’ reference-number

‘14’ cellname-string

20.2 In record type ‘13’, reference-number is an unsigned-integer referring to a CELLNAME record where the

cell name is stored. In record type ‘14’, cellname-string stores the cell name locally. In either representation, the

cell name must be an n-string.

20.3 All subsequent records in the file up to the next CELL, END, or <name> record are considered to be part of

that cell.

20.4 EXCEPTION HANDLING

— Use of a reference-number for which there is no corresponding CELLNAME

record within the same OASIS file should be treated as a fatal error. Multiple CELL records within a single file

which refer to the same cell name (in effect, a duplicate cell definition) should also be treated as a fatal error.

21 XYABSOLUTE & XYRELATIVE Records

21.1 The XYABSOLUTE and XYRELATIVE records control the value of modal variable xy-mode, which in turn

governs the interpretation of the x and y values found in PLACEMENT, <geometry>, and TEXT records. They

consist simply of a record-ID with no additional fields:

‘15’ = XYABSOLUTE

‘16’ = XYRELATIVE

21.2 When each CELL record is encountered, modal variable xy-mode is set to absolute, and related modal position

variables placement-x, placement-y, geometry-x, geometry-y, text-x, and text-y are set to 0. The presence of an

XYRELATIVE record forces modal variable xy-mode to relative, and the presence of an XYABSOLUTE record

forces modal variable xy-mode to absolute. This mode may be changed any number of times within a cell definition.

21.3 In absolute mode, explicit x and y values, when present, are used directly as the actual (x,y) coordinates.

21.4 In relative mode, explicit x and y values, when present, are interpreted as relative displacements from the

stored position information in modal variables placement-x, placement-y, geometry-x,

geometry-y, text-x, or text-y,

depending on the record type in which they occur. In this mode, the actual x-coordinate is computed as the sum of

the x value and its corresponding modal position variable, and the actual y-coordinate is computed as the sum of the

y value and its corresponding modal position variable.

21.5 In both absolute and relative modes, when an x or y value is not explicitly present in the record, the value of

the corresponding modal position variable is used for the actual x or y coordinate. In both absolute and relative

modes, the corresponding modal position variables are always updated with the actual (x,y) coordinate position.

21.6 The interpretation of point-lists and repetitions does not depend on absolute or relative mode. Also, even when

a given element includes a repetition, the corresponding modal position variables (placement-x, placement-y,

geometry-x, geometry-y, text-x, or text-y) are always updated with the actual (x,y) coordinate of the initial element.

22 PLACEMENT Record

22.1 A PLACEMENT record describes one or more placements of the referenced cell within the current cell. It has

the following format:

‘17’ placement-info-byte [ reference-number | cellname-string ] [ x ] [ y ] [ repetition ]

‘18’ placement-info-byte [ reference-number | cellname-string ] [ magnification ] [ angle ]

[ x ] [ y ] [ repetition ]