XSD 中模式匹配的正则表达式

Question

I am writing XSD pattern restriction and I have the following strings that are valid

1. $name
2. {.newvalue}
3. {testing}
4. $name.testing

And the below are invalid

1. {$testing}
2. $testing}
3. {testing

No uppercase or @ symbol allowed.

I have tried this <xs:pattern value="\{\w?[a-z0-9A-Z\.]*\}|\$\w+(\.[\w]+)*"/> this work partially but doesn't satisfy all conditions

Any help is appreciated.

Answer 1

You may use

<xs:pattern value="\$[a-z0-9]+(\.[a-z0-9]+)*|\{\.?[a-z0-9]+\}" />

The XSD regex is always anchored at the string start/end, see the regex demo .

Details

• \$[a-z0-9]+(\.[a-z0-9]+)* - $ , one or more lowercase ASCII letters and then zero or mre sequences of a dot and one or more lowercase ASCII letters
• | - or
• \{\.?[a-z0-9]+\} - { , an optional . , then 1 or more lowercase ASCII letters and then a } char.

Answer 2

Try \{?\$?[az.]+\}?

It's not easy to work out what the actual rules are: your attempted regex allows digits, but none of the examples use digits; and your attempted regex explicitly allows upper case, but your text suggests upper case isn't allowed. And why do you mention '@' specifically, and not other punctuation characters?