Examples of expression matching

Example	Description
^(Invoice[a-z]*[1-9]+)$	Matches all subjects that start with the word "Invoice", followed by 0 or more characters, followed by at least one numeric digit, and no other characters after it. Therefore, possible matches are: Invoice2 InvoiceForShipment23 This expression will not match the following: ShipmentInvoices, ShipmentInvoices34, ShipmentInvoices34A, Invoice, InvoiceA2B.
(Invoice[a-z]*[1-9]+)	Matches all subjects that contain the word "Invoice", followed by 0 or more characters, followed by at least one numeric digit. Therefore, possible matches are: Invoice2 ShipmentInvoices34 ShipmentInvoices34A InvoiceA2B InvoicesForShipment23 This component will not match the following: ShipmentInvoice, ShipmentInvoices (because it still requires at least one numeric digit following Invoice [a-z]* )
([123]+[^a-c](start\|end)+)$	Matches all subjects that begin with any set of characters, followed by at least one occurrence of 1, 2, 3, followed by only one letter not in the range a-c, followed by the word "start" or "end" one or more times, and no other characters following it. Therefore, possible matches are: Invoice23Mendstartend Invoice12Send SimpleInvoice1d This component will not match the following: mEnd (because there is no starting matching sequence with 1, 2, or 3), 1mstartFile (because no characters should follow the word “end”/ “start”), or 1start (because there is no character in between “1” and “start” that is in the range of c-z ).

Example

Description

^(Invoice[a-z]*[1-9]+)$

Matches all subjects that start with the word "Invoice", followed by 0 or more characters, followed by at least one numeric digit, and no other characters after it.

Therefore, possible matches are:
Invoice2
InvoiceForShipment23

This expression will not match the following: ShipmentInvoices, ShipmentInvoices34, ShipmentInvoices34A, Invoice, InvoiceA2B.

(Invoice[a-z]*[1-9]+)

Matches all subjects that contain the word "Invoice", followed by 0 or more characters, followed by at least one numeric digit.

Therefore, possible matches are:

Invoice2
ShipmentInvoices34
ShipmentInvoices34A
InvoiceA2B
InvoicesForShipment23

This component will not match the following: ShipmentInvoice, ShipmentInvoices (because it still requires at least one numeric digit following Invoice [a-z]* )

([123]+[^a-c](start|end)+)$

Matches all subjects that begin with any set of characters, followed by at least one occurrence of 1, 2, 3, followed by only one letter not in the range a-c, followed by the word "start" or "end" one or more times, and no other characters following it.

Therefore, possible matches are:

Invoice23Mendstartend
Invoice12Send
SimpleInvoice1d

This component will not match the following: mEnd (because there is no starting matching sequence with 1, 2, or 3), 1mstartFile (because no characters should follow the word “end”/ “start”), or 1start (because there is no character in between “1” and “start” that is in the range of c-z ).