Linked Data Wrappers (LDWs) turn Web APIs into RDF end-points, leveraging the Linked Open Data cloud with current data. Unfortunately, LDWs are fragile upon upgrades on the underlying APIs, compromising LDW stability. Hence, for API-based LDWs to become a sustainable foundation for the Web of Data, we should recognize LDW maintenance as a continuous effort that outlives their breakout projects. This is not new in Software Engineering. Other projects in the past faced similar issues. The strategy: becoming open source and turning towards dedicated platforms. By making LDWs open, we permit others not only to inspect (hence, increasing trust and consumption), but also to maintain (to cope with API upgrades) and reuse (to adapt for their own purposes). Promoting consumption, adaptation and reuse might all help to increase the user base, and in so doing, might provide the critical mass of volunteers, current LDW projects lack. Drawing upon the Helping Theory, we investigate three enablers of volunteering applied to LDW maintenance: impetus to respond, positive evaluation of contributing and increasing awareness. Insights are fleshed out through SYQL, a LDW platform on top of Yahoo’s YQL. Specifically, SYQL capitalizes on the YQL community (i.e. impetus to respond), providesannotation overlays to easy participation (i.e. positive evaluation of contributing), and introduces aHealth Checker (i.e. increasing awareness). Evaluation is conducted for 12 subjects involved in maintaining someone else’s LDWs. Results indicate that both the Health Checker and the annotation overlays provide utility as enablers of awareness and contribution.

链接数据包装器（LDW）将Web API转换为RDF端点，并利用链接开放数据云和当前数据。不幸的是，LDW在升级基础API时非常脆弱，从而损害了LDW的稳定性。因此，为了使基于API的LDW成为数据网络的可持续基础，我们应该认识到LDW维护是一项持续的工作，超出了其突破性项目。这不是软件工程中的新增功能。过去其他项目也面临类似的问题。战略：成为开源并转向专用平台。通过开放LDW，我们不仅允许其他人进行检查（因此，增加信任度和使用量），而且还可以进行维护（以应对API升级）和重用（以适应自己的目的）。促进消费，适应和重用可能都有助于增加用户群，这样做可能会提供大量的志愿者，而目前的LDW项目却缺乏。根据帮助理论，我们调查了应用于LDW维护的三个自愿因素：推动响应，积极评估贡献和提高意识。洞察力通过SYQL充实，SYQL是雅虎YQL之上的LDW平台。具体来说，SYQL会利用YQL社区（即做出回应的动力），提供注释覆盖到易于参与（即对贡献做出积极评价）的位置，并引入了健康检查器（即提高意识）。对涉及维护他人的LDW的12个主题进行了评估。结果表明，“运行状况检查器”和“注释覆盖图”都可以作为意识和贡献的实现者。