Alfresco cron 语法：0/2 和 */2 之间的区别？
Alfresco cron syntax: difference between 0/2 and */2?
Alfresco 有一个类似于 cron 的系统，允许您定期 运行 一项工作。 The documentation specifies as an example the expression 0 0/2 * * * ? which will make the job run every 2 minutes. However, in a lot of code I see people using the expression 0 */2 * * * ? instead, the difference being that the zero is replaced by an asterisk. This syntax is more similar to the syntax found in some Unix implementations of cron，但我认为我不能盲目地假设它们的工作方式相同（例如，Alfresco 的语法有一个 seconds 字段，而 Unix 语法则没有）。
所以我的问题是，表达式 0/2 和 */2 在功能上有什么区别吗？作为后续，是否有适当记录 Alfresco 语法的地方？
Oliver Charlesworth's comment led me to the Quartz docs 包含答案：
You can also specify ‘/’ after the ‘*’ character - in this case ‘*’ is equivalent to having ‘0’ before the ‘/’.
所以 0/2 和 */2 是等效的 cron 表达式。
Alfresco 有一个类似于 cron 的系统，允许您定期 运行 一项工作。 The documentation specifies as an example the expression 0 0/2 * * * ? which will make the job run every 2 minutes. However, in a lot of code I see people using the expression 0 */2 * * * ? instead, the difference being that the zero is replaced by an asterisk. This syntax is more similar to the syntax found in some Unix implementations of cron，但我认为我不能盲目地假设它们的工作方式相同（例如，Alfresco 的语法有一个 seconds 字段，而 Unix 语法则没有）。
所以我的问题是，表达式 0/2 和 */2 在功能上有什么区别吗？作为后续，是否有适当记录 Alfresco 语法的地方？
Oliver Charlesworth's comment led me to the Quartz docs 包含答案：
You can also specify ‘/’ after the ‘*’ character - in this case ‘*’ is equivalent to having ‘0’ before the ‘/’.
所以 0/2 和 */2 是等效的 cron 表达式。