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Extension to Distributed Annotation System: Summary command

机译：扩展到分布式注释系统：摘要命令

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摘要

Using the current version of the Distributed Annotation System (DAS) protocol to obtain data from large regions of interest from remote DAS servers can be a time and resource consuming process. Therefore it would be useful to know the amounts and types of features that exist in a region of interest before the DAS request is made. In the current DAS protocol (1.6), the types of data that exist with a DAS source can be obtained before the complete set of features are requested for a specific region using the feature command. Depending on the implementation of the types command in the DAS server, the number of features across the segment can also be obtained. However, counting of features is computationally intensive for every user request and so most DAS servers do not include it in their implementation. For these DAS servers in order for the user to obtain counts of features, the complete set of features needs to be obtained and re-analysed. Additionally in the current DAS protocol no parameter exists to include or exclude the count of features per type when needed. In this paper, an addition to DAS protocol is proposed and implemented in order to request a summary of the features that exist within a region of interest when needed. The summary command was implemented in order to broaden the functionalities, and extend the flexibility of the current DAS protocol. The summary functionality can conserve time and resources, especially for large regions of interest.
机译：使用当前版本的分布式注释系统（DAS）协议从远程DAS服务器从较大的目标区域获取数据可能是一个耗时和资源消耗的过程。因此，在发出DAS请求之前，了解感兴趣区域中存在的特征的数量和类型将很有用。在当前的DAS协议（1.6）中，可以在使用feature命令为特定区域请求完整功能集之前，获取DAS源存在的数据类型。根据DAS服务器中types命令的实现，还可以获得跨网段的要素数量。但是，对于每个用户请求，功能计数都是计算密集型的，因此大多数DAS服务器不会在其实现中包括该功能。对于这些DAS服务器，为了使用户获得功能计数，需要获取并重新分析完整的功能集。另外，在当前的DAS协议中，在需要时不存在用于包括或排除每种类型的特征数量的参数。在本文中，提出并实施了DAS协议的附加功能，以便在需要时要求对感兴趣区域内存在的功能进行汇总。实施summary命令是为了扩展功能，并扩展当前DAS协议的灵活性。摘要功能可以节省时间和资源，尤其是对于大片感兴趣的区域。

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