# 1.1 Language Standards Conformance

Compaq Fortran conforms to American National Standard Fortran 95 (ANSI X3J3/96-007)1, American National Standard Fortran 90 (ANSI X3.198-1992)2, and includes support for the High Performance Fortran Language Specification.

The ANSI committee X3J3 is currently answering questions of interpretation of Fortran 95 and Fortran 90 language features. Any answers given by the ANSI committee that are related to features implemented in Compaq Fortran may result in changes in future releases of the Compaq Fortran compiler, even if the changes produce incompatibilities with earlier releases of Compaq Fortran (formerly DIGITAL Fortran).

Compaq Fortran provides a number of extensions to the Fortran 95 Standard. In the language reference manual, extensions are displayed in this color.

Compaq Fortran also includes support for programs that conform to the previous Fortran standards (ANSI X3.9-1978 and ANSI X3.0-1966), the International Standards Organization standard ISO 1539-1980 (E), the Federal Information Processing Institute standard FIPS 69-1, and the Military Standard 1753 Language Specification.

1This is the same as International Standards Organization standard ISO/IEC 1539-1:1997 (E).
2This is the same as International Standards Organization standard ISO/IEC 1539:1991 (E).

For More Information:

For a summary of Compaq Fortran language extensions, see Appendix H.

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