Background: The absence of agreed-upon terminology, definitions, and operational classifications has hampered research in the field of suicidology for many decades. Aims and Method: We systematically reviewed contemporary classifications of suicidal behavior using the scope of the classification (comprehensive vs. restricted or single behaviors), and the presence or absence of a classification scheme and an operational definition of intent as features to enable analysis and comparison. Results: A chronological perspective shows that classification systems tend to be more and more precise and operational for clinical and research field work. However, on an international level, the development of classifications appears to precede the establishment of agreed-upon definitions and terms to describe suicidal behavior. Limitations: The review was conducted in English only. Conclusion: Universal agreement on definitions and terms for suicidal behavior should precede the development of classifications.

中文翻译：

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当代的自杀行为分类。

背景：几十年来，缺乏一致认可的术语，定义和操作分类一直困扰着自杀学领域的研究。目的和方法：我们使用分类的范围（全面与受限或单一行为），是否存在分类方案以及意图的操作性定义作为系统分析和比较的系统评价了当代自杀行为的分类。结果：按时间顺序显示，分类系统在临床和研究领域的工作中越来越趋于精确和可操作。但是，在国际一级，分类的发展似乎先于达成商定的定义和描述自杀行为的术语。局限性：审查仅以英文进行。结论：关于自杀行为的定义和术语的普遍共识应在分类发展之前。