ANSI Z80.24-2002 pdf download Ophthalmic Optics – Information Interchange for Ophthalmic Optical Equipment
1 Scope
This International Standard establishes a method by which machines and computer software systems used in the fabrication of ophthalmic lenses can exchange information.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.
ISO 1 3666 : 1 998, Ophthalmic optics — Spectacle lenses — Vocabulary.
3 Terms and definitions
For the purposes of this International Standard, the terms and definitions given in ISO 1 3666 and the following apply.
3.1 General
3.1.1
device
machine or instrument used in the fabrication of ophthalmic lenses that communicates with a computer system to send or receive job information
3.1.2
host
computer system providing information to or receiving information from a device
3.1.3
job
order for prescription ophthalmic lenses or spectacles
3.1.4
download
communication session in which the host system transmits data to the device
3.1.5
upload
communication session in which the device transmits data to the host
3.2 Special characters
3.2.1
code separator
special character used to delimit codes in a device record
3.2.2
CRC position character
special character marking the location of the end of the data records and the start of the optional CRC record within a packet
3.2.3
end character
special character marking the end of a packet
3.2.4
field separator
special character delimiting the fields in a record
3.2.5
label separator
special character separating the record label from the field(s) within a record
3.2.6
mandatory record flag
special character marking certain records as mandatory
3.2.7
start character
special character marking the beginning of a packet
3.2.8
record separators
special characters which delimit records
3.2.9
reserved characters
set of characters reserved for special functions
3.2.10
unknown data indicator
special character indicating that data required for a particular field is unknown to the host
3.2.11
ACK character
special character indicating successful transmission of a packet
3.2.12
NAK character
special character indicating failed transmission of a packet
3.3 Data types
3.3.1
limited data
text data limited to a maximum length