Map Viewing Service (WMS) of the dataset: Linear stake of PPRN field movements of the Clain Valley department of Vienna

Generally speaking, the stakes are people, property, activities, cultural or environmental heritage elements, threatened by a hazard and likely to be affected or damaged by it. The sensitivity of an issue to a hazard is called “vulnerability”.
This object class brings together all the issues that have been addressed in the RPP study. An issue is a dated object whose consideration depends on the purpose of the RPP and its vulnerability to the hazards studied. A PPR issue can therefore be considered (or not) depending on the type or types of hazard being addressed.
These elements form the basis of knowledge of the land cover necessary for the development of the RPP, in or near the study area, at the time of the analysis of the issues.

The data on issues represent a (figible and non-exhaustive) photograph of assets and individuals exposed to hazards at the time of the development of the risk prevention plan. This data is not updated after approval of the RPP. In practice they are no longer used: the issues are recalculated as necessary with up-to-date data sources.

总体而言，承险体指面临致灾因子威胁、并可能受其影响或损毁的人员、财产、各类活动、文化遗产或环境遗产要素。某一议题对致灾因子的敏感程度被称为易损性（vulnerability）。
本对象类囊括了风险预防计划（Risk Prevention Plan，缩写RPP）研究中涉及的全部议题。所谓议题，是一类具有明确时间属性的对象，其是否被纳入考量取决于RPP的目标，以及其对所研究致灾因子的易损性。因此，PPR议题是否被纳入考量，取决于当前所针对的一种或多种致灾因子类型。
上述要素构成了在议题分析阶段，于研究区域内及邻近区域编制风险预防计划所需的土地覆盖认知基础。
相关议题的数据，是风险预防计划编制阶段受致灾因子威胁的资产与人群的有限且非穷尽的数据快照。该数据在风险预防计划获批后不再更新。实际应用中此类数据已不再直接使用：相关议题会根据需要采用最新数据源重新计算生成。