APPENDIX H
1100
Compatibility and Implementation Notes
encoded as UTF-8. Fortunately, UTF-8 encoding is very stylized and its
use can usually be recognized. A name that does not conform to UTF-8
encoding rules can instead be interpreted according to host platform en-
coding.
6. When a stream specifies an external file, PDF 1.1 parsers ignore the file
and always use the bytes between
stream
and
endstream
.
7. Acrobat viewers accept the name
DP
as an abbreviation for the
DecodeParms
key in any stream dictionary. If both
DP
and
DecodeParms
entries are present,
DecodeParms
takes precedence.
8. Acrobat viewers require that the name object used as a key in a dictionary
entry be a direct object; an indirect object reference to a name is not ac-
cepted.
9. Acrobat viewers accept the abbreviated filter names shown in Table H.1 in
addition to the standard ones. Although the abbreviated names are
intended for use only in the context of inline images (see Section 4.8.6, “In-
TABLE H.1 Abbreviations for standard filter names
STANDARD FILTER NAME
ABBREVIATION
ASCIIHexDecode
ASCII85Decode
LZWDecode
FlateDecode
(PDF 1.2)
RunLengthDecode
CCITTFaxDecode
DCTDecode
AHx
A85
LZW
Fl
(uppercase F, lowercase L)
RL
CCF
DCT