Table 1 describes the required deployment descriptor and optional deployment plan.

表1描述了必需的部署描述符和可选的部署计划。

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The index attribute is optional and allows you to specify an index name that will be used as the leading index in an 'IXAND' plan.

index属性是可选的，并允许您指定一个索引名来作为“IXAND”计划中的主索引。

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Another addition to the Geronimo Web plan is an optional reference to the Web container using an element, as shown in Listing 4.

另一处对Geronimo Web方案的增加是使用一个元素对web容器的选择性引用，如清单4所示。

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Call of Duty has an optional subscription plan and players are encouraged to buy the new version every November.

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The compromise reached Wednesday includes an optional government-run insurance plan that allows hospitals and doctors to negotiate reimbursement rates directly, rather than accept low Medicare rates.

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For example, Adobe Systems Inc. in San Jose posts its employee benefits online, including deductibles for medical and dental insurance, payroll deductions for optional coverage and details about its sabbatical programs, 401(k) plan, profit sharing and employee stock purchase plans.

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