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canonical format
A standard way of writing a formula. For example,
two formulas, such as 9 + x and x + 9, are said to be equivalent
because they mean the same thing; however, the second one is in
"canonical form" because it is written in the usual way, with the highest
power of x first. Usually, there are fixed rules you can use to
decide whether something is in canonical form. Things in canonical
form are easier to compare.
This table describes the different
field types and their canonical formats. Note that values surrounded
by square brackets are optional. Currency and grouping symbols are
not valid in canonical format.
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Field type
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Description
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Canonical format
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Example
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Date fields
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An ISO-8601/XFA date string
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YYYY[-MM[-DD]]
YYYY[MM[DD]]
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2005-07-04
20050704
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Date/time fields
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An ISO-8601/XFA date time, which is the
concatenation of a valid ISO-8601/XFA date string and a valid ISO-8601/XFA
time string with the letter
'
T' as a separator between the
date and time string
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2004-07-04T10:11:12+05:00
20040704T101112
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Numeric fields
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A sequence of ASCII digits consisting of
an integral part, a decimal point, a fractional part, and optionally,
an e (or E) and a signed exponent part
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12
1.234
.12
1e-2
1.2E3
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Text fields
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Any sequence of Unicode characters without
using spaces
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A1B2C3
Display Pattern: A9A 9A9
Formatted
Value: A1B 2C3
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Time fields
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An ISO-8601/XFA time string
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HH[:MM[:SS[.FFF][Z]]]
HH[:MM[:SS[.FFF][+HH[:MM]]]]
HH[:MM[:SS[.FFF][-HH[:MM]]]]
HH[MM[SS[.FFF][Z]]]
HH[MM[SS[.FFF][+HH[MM]]]]
HH[MM[SS[.FFF][-HH[MM]]]]
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10:11:12.123+05:00
101112+0500
10:11:12Z
10:11
10
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certificate
A
public key that corresponds to a credential (private key) used in
encryption and signing operations. See also
Adobe certified document
.
client
The
requesting program or person in a client/server relationship. A
web browser is an example of a client application.
credential
A
private key used to establish identity in decryption and signing
operations.
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