This dataset includes all newly added MeSH Main Headings for 2023. Headings play a central role in MeSH vocabulary as a unit of Indexing and retrieval. With the exception of Class 3 Descriptors, all descriptors are organized into a numbered tree structure or hierarchy that allows users to browse in a orderly fashion from broader to narrower topics. Scope Notes provide a concise summary describing the meaning and scope of the MeSH Descriptor.

Publication Types (Publication Characteristics) are Descriptors that indicate what an indexed item is, (i.e., its genre, rather than what it is about - for example, Historical Article). They may include Publication Components, such as Charts; Publication Formats, such as Editorial; and Study Characteristics, such as Clinical Trial.

They function as metadata, rather than being about the content. These records are searchable in PubMed as Publication Type [PT], and the terms in MEDLINE records are labeled as "PT" or rather than "MH" or . They are listed in category V of the MeSH Tree Structures.

(Includes MeSH 2023 changes) The MeSH 2024 Update - Add Report lists new Descriptors and Supplementary Concept Records (SCRs) that have been added to MeSH for the upcoming new release. It also includes terms that replace deleted terms, as well as new entry combinations (new precoordinated descriptor heading that replaces an existing descriptor/subheading combination). There are two filtered views available. This report includes MeSH changes from previous years, starting from 2023.

(Includes MeSH 2023 changes) The MeSH 2024 Update - Combine Report lists new Entry Combinations. These are cases where a new, precoordinated Descriptor has been created to replace an existing Descriptor / Qualifier combination. This report includes MeSH changes from previous years, starting from 2023.

(Includes MeSH 2023 changes) The MeSH 2024 Update - Delete Report lists Descriptors and Supplementary Concept Records (SCRs) that have been removed from MeSH. There are two filtered views available. This report includes MeSH changes from previous years, starting from 2023.

(Includes MeSH 2023 changes) The MeSH 2024 Update - Merge Report describes cases where two or more terms have merged into a single term. The term(s) being merged into another term become(s) an Entry Term. Merges can be between Descriptors and Supplementary Concept Records (SCRs), between Descriptors, or between SCRs. There are two filtered views available. This report includes MeSH changes from previous years, starting from 2023.

(Includes MeSH 2023 changes) The MeSH 2024 Update - Preferred Term Update Report lists changes to the Preferred Term of a Descriptor or a Supplementary Concept Record (SCR). There are two filtered views available. This report includes MeSH changes from previous years, starting from 2023.

(Includes MeSH 2023 changes) The MeSH 2024 Update - Registry Number Update Report lists changes to Registry Numbers on a Descriptor or Supplementary Concept Record (SCR). There are two filtered views available. This report includes MeSH changes from previous years, starting from 2023.

(Includes MeSH 2023 changes) The MeSH 2024 Update - Replace Report lists Descriptors and Supplementary Concept Records (SCRs) where an existing MeSH term has been replaced by another term. Note that replacement terms are not necessarily new to the vocabulary; terms are sometimes consolidated under or moved to other existing terms. There are two filtered views available. This report includes MeSH changes from previous years, starting from 2023.

(Includes MeSH 2023 changes) The MeSH 2024 Update - Split Report lists terms that are replaced by a set of terms, either descriptors or SCRs, instead of a single term. This report includes MeSH changes from previous years, starting from 2023.