ETSI EN 319 142-1规定了PAdES数字签名。PAdES签名基于ISO 32000-1[1]中规定的PDF签名，采用替代签名编码，通过合并签名和未签名属性，支持等同于ETSI EN 319 122-1[2]中规定的签名格式CADE的数字签名格式，这些属性在许多用例中满足某些通用要求（如数字签名的长期有效性）。本文件规定了PAdES基线签名的格式，当电子文档中使用的数字签名明确需要互操作性时，它提供了适用于广泛社区的电子程序和通信的广泛商业和政府用例所需的基本功能。 本文件定义了四个级别的PAdES基线签名，以满足增量需求，从而在长期内保持签名的有效性，以某种方式，某一级别始终满足其以下级别的所有需求。每个级别都需要存在特定的PAdES属性，这些属性经过适当的分析，以尽可能减少可选性。PAdES数字签名的创建、增强和验证程序超出了范围，并在ETSI EN 319 102-1[i.5]中进行了规定。ETSI TR 119 100[i]中提供了关于创建、增强和验证PAdES数字签名的指南，包括本文件中定义的不同属性的使用。 4]. 本文件旨在支持不同监管框架下的电子签名。注:本文件中规定的PAdES数字签名旨在支持电子签名、高级电子签名、合格电子签名、电子印章、高级电子印章和符合法规（EU）的合格电子印章 第910/2014号[i.2]。

ETSI EN 319 142-1 specifies PAdES digital signatures. PAdES signatures build on PDF signatures specified in ISO 32000-1 [1] with an alternative signature encoding to support digital signature formats equivalent to the signature format CAdES as specified in ETSI EN 319 122-1 [2], by incorporation of signed and unsigned attributes, which fulfil certain common requirements (such as the long term validity of digital signatures) in a number of use cases.The present document specifies formats for PAdES baseline signatures, which provide the basic features necessary for a wide range of business and governmental use cases for electronic procedures and communications to be applicable to a wide range of communities when there is a clear need for interoperability of digital signatures used in electronic documents.The present document defines four levels of PAdES baseline signatures addressing incremental requirements to maintain the validity of the signatures over the long term, in a way that a certain level always addresses all the requirements addressed at levels that are below it. Each level requires the presence of certain PAdES attributes, suitably profiled for reducing the optionality as much as possible.Procedures for creation, augmentation, and validation of PAdES digital signatures are out of scope and specified in ETSI EN 319 102-1 [i.5]. Guidance on creation, augmentation and validation of PAdES digital signatures including the usage of the different attributes defined in the present document is provided in ETSI TR 119 100 [i.4]. The present document aims at supporting electronic signatures in different regulatory frameworks.NOTE: Specifically but not exclusively, PAdES digital signatures specified in the present document aim at supporting electronic signatures, advanced electronic signatures, qualified electronic signatures, electronic seals, advanced electronic seals, and qualified electronic seals as per Regulation (EU) No 910/2014 [i.2].