Grammatical Features Inventory: Syncretic Index

In attempting to understand language, many researchers use features, the elements
into which linguistic units, such as words, can be broken down. Examples of features
are NUMBER (singular, plural, dual, ...), PERSON (1st, 2nd, 3rd), and TENSE (present,
past, ...). Features have proved invaluable for analysis and description, and have a
major role in contemporary linguistics, from the most abstract theorising to the most
applied computational applications. Yet little is firmly established about features:
we have no inventory of which features are found in the world's languages, no agreed
account of how they operate across different components of language, no certainty on
how they interact, and thus no general theory of features. They are used, but are
little discussed and poorly understood. This is a central gap in the conceptual
underpinning of much linguistic investigation.

The Grammatical Features Inventory is an attempt to put the notion of linguistic
'feature' on a sounder empirical and conceptual base. It aims to provide evidence for
the diverse content of features in the world's languages, as well as discuss some of
their formal properties, particularly in morphology (word structure) and syntax
(sentence structure).

A syncretic index allows reference to a form which does not correspond to a morphosyntactic value - specifically, where the form corresponds to a set of values (syncretism). We need to capture combinations of morphosemantic or morphosyntactic feature specifications which are treated morphologically as a single unit. Through syncretic index we capture the generalisation that the same pattern of syncretism is found across distinct parts of the paradigm. For discussion and references to further literature, see Corbett and Baerman (2006).

This resource was created for the project 'Grammatical features: A key to
understanding language', funded by the Economic and Social Research Council under
grant number RES-051-27-0122. This support is gratefully acknowledged.

在探索语言本质的过程中，诸多研究者会运用特征（feature）——即可将词语等语言单位拆解得到的构成要素。特征的示例包括数（NUMBER，涵盖单数、复数、双数等）、人称（PERSON，涵盖第一、第二、第三人称）及时态（TENSE，涵盖现在时、过去时等）。特征已被证实对语言分析与描述极具价值，在当代语言学研究中占据核心地位——从最抽象的理论建构到最具实用性的计算应用，均离不开特征的运用。然而目前关于特征的共识寥寥：我们尚未梳理出全球语言中存在的特征清单，尚未就特征如何作用于语言的不同维度达成统一阐释，也未能明确特征间的交互机制，因此至今尚未形成一套普适性的特征理论。尽管特征被广泛使用，却鲜少被深入探讨与透彻理解，这一短板正是当前诸多语言学研究的概念基础中存在的核心空白。

《语法特征汇编》（Grammatical Features Inventory）旨在为语言“特征”这一概念建立更扎实的经验与概念基础。本汇编旨在为全球语言中特征的多样内涵提供实证依据，同时探讨特征的若干形式属性，尤其是在形态学（词语结构）与句法学（句子结构）领域的相关属性。

混同索引（syncretic index）可用于指代不符合单一形态句法值的形式——具体而言，即当某一形式对应一组语法值时的情形（此现象称为形式混同（syncretism））。我们需要对那些在形态层面被视作单一单元的形态语义或形态句法特征规约组合进行标注。借助混同索引，我们能够归纳出同一范式的不同部分存在相同形式混同模式这一共性规律。如需进一步探讨及查阅相关文献，请参阅Corbett与Baerman（2006）的研究成果。

本资源是为“语法特征：破解语言奥秘的关键”项目开发的，该项目由经济与社会研究委员会（Economic and Social Research Council）资助，资助编号为RES-051-27-0122。在此谨对该资助表示诚挚谢意。