Literature Review with AI Mind Maps

When several papers use the same method name, it is easy to group them together before checking their datasets or evaluation rules. Keep one outline per source first. Compare methods and findings only after you can trace each claim back to its paper.

This workflow takes you from individual PDFs to a comparison note and a draft literature-review outline. MindLM generates each paper's map. You check the claims, add source references, and combine findings in your note editor. For the upload controls alone, use the single-PDF tutorial.

Keep each map tied to one PDF version; the review argument is written in your comparison note, not inside a merged MindLM canvas.

1. Choose the papers and record their versions

Start with papers relevant to your review question. Keep the original PDFs and their reference-manager entries together. Before mapping a paper, record its title, authors, year, source URL or DOI, and the version you downloaded. If you use citation keys, copy the key from your reference manager.

For example, an arXiv preprint can have several revisions. A source link alone may not tell you which file produced an older map. Keep the filename or version identifier in your reading note as well.

MindLM does not create Zotero records, search the literature for you, or decide which studies belong in your review. If your project requires a formal search or screening protocol, keep following it separately from this note-taking workflow.

2. Generate one map per PDF

Sign in, open Research Paper to Mind Map, and upload one PDF. Check the generation settings and credit quote before starting. After generation, open the source beside the map.

The current document limits are:

Plan	Maximum PDF upload	Text processed per generation
Free	10 MB	First 100,000 characters
Pro	10 MB	First 300,000 characters
Max	10 MB	First 600,000 characters

A file can fit the upload limit while exceeding the text limit. If later sections are missing, check the input length and the PDF itself before using the map as an outline of the whole paper. Scanned PDFs go through OCR; equations, tables, and complex layouts still need checking in the original.

Upload one PDF at a time and read the quote before you start.

Free includes 10 signup credits, 1 credit per daily login, and at most 3 credit-funded generations a day. Each run still needs sufficient credits. Choose your next paper after checking the previous output rather than generating a queue of maps you have not read. Pricing lists the current plans.

3. Check a claim before changing its label

The generated hierarchy can regroup sections or omit details even when the PDF has clear headings. Compare the map with the source's section list, then choose a claim you expect to use in your review.

Check the claim's method, data, result, and limitations. If a node says “improved performance,” find what was compared, how performance was measured, and where the result appears. If you cannot find support, mark it as an open question in your own notes.

You can rename nodes on Free. Adding or deleting nodes requires Pro or Max; you can also reorganize an exported Markdown file in a text editor. A label such as “Results — check Table 2 before citing” is a reading reminder you add, not proof that the table supports a claim.

Rename for navigation only after you can point to the claim in the PDF.

Inspect an archived paper map

The Attention Is All You Need example was generated from 1706.03762v7.pdf on September 27, 2026 with the Fast model. Compare it with the v7 paper on arXiv. Its “The Transformer Model” branch gives you a place to begin checking Section 3; it does not replace that section.

The PDF tutorial's source comparison shows where the generated branches differ from the paper headings. Keep this distinction when comparing papers: a map label is a generated grouping, while a source heading belongs to the paper.

4. Save and export a note with its source attached

Wait for auto-save or press ⌘S, then choose Export → Markdown. Free includes Markdown, PNG, and XMind export. SVG requires Pro or Max. Markdown exports the saved outline; it does not add verified citations or page references.

For the archived paper above, you could name the file vaswani-2017-transformer.md and put it in a Papers folder in your Obsidian vault. Add this provenance block above the generated text:

Source: https://arxiv.org/abs/1706.03762v7
File version: 1706.03762v7.pdf
Citation key: [replace with the key in your reference manager]
Checked against source: [fill in after reading]

## My verification notes
- Map branch "The Transformer Model": compare with source Section 3.
- Results: check task, dataset, model, and table before citing a score.
- Open question: [write your own question here]

This block is a suggested manual addition, not AI output or a completed verification record. Fill it in while reading the PDF. Preserve qualifications that affect a finding, including the population or task to which it applies.

Obsidian opens the file as headings and lists. It does not become a visual mind map automatically, and changes in your vault do not sync back to MindLM. The export guide covers the download and vault steps.

5. Build the comparison outside MindLM

Create a separate review note in the editor you use for writing. Keep the per-paper notes intact so that a combined paragraph can still be traced to each source. MindLM does not automatically merge PDFs, reconcile findings, or link nodes across maps.

Start with a table. The row below is a template, not research data:

Paper and version	Method and data	Finding to check	Source location	Verification note
[citekey, version]	[procedure, dataset or sample]	[one claim in your words]	[section, page or table]	[checked / open question, plus caveat]

Fill each row from the paper, using the map to navigate. A row without a source location remains unfinished. Keep exact quotations in quotation marks and record them from the original, not from generated labels.

Maps stay per paper; the comparison table lives in your note editor.

Decide whether two findings are comparable

Two maps can both contain an “Accuracy” branch while the papers use different metrics. Before grouping them, compare:

• Definition: Are they measuring the same outcome?
• Procedure: Are the methods and evaluation rules comparable?
• Scope: Do they study the same task, population, or setting?

If these differ, describe the difference in the review rather than treating the labels as agreement. If the methods really are comparable and the findings conflict, keep both source references next to the sentence describing that conflict.

Turn the table into a writing outline

Create headings that answer your review question: for example, definitions, methods, evidence, and unresolved questions. These are possible headings, not a required chapter structure.

Under each heading, place the relevant citation keys and a sentence explaining the relationship between the papers. Move a paper into more than one section when it supports different parts of the argument. Do this in your external review note; the individual MindLM maps remain records of each generation and your edits.

6. Write with the PDFs open

Use the comparison note to decide the order of your argument. For each statement about a finding, reopen the source location you recorded. Check the wording, numbers, and qualifications before adding the citation through your reference manager.

Keep three kinds of text distinct in your notes:

Text	How to handle it
Original quotation	Copy from the paper, mark as a quotation, and record the location
Generated map label	Treat as an unverified summary until checked
Your interpretation	Explain your reasoning and identify the sources it relies on

A paper's Related Work section is also that paper's account of earlier research. Read the original work before relying on it for a claim central to your review.

When the outline is incomplete or misleading

A later section is absent. Check whether the text limit excluded it, whether extraction missed it, or whether generation omitted it. Read the section in the PDF. You can map a relevant excerpt separately and label that note as an excerpt; do not present it as a full-paper map.

A result has lost its conditions. Return to the source and restore the task, comparison, or limitation in your reading note. Keep it with the result when writing.

The map uses a different section structure. Compare topics with the paper rather than trying to infer page numbers from branch order. Rename labels for your own navigation and preserve the paper's references in the exported note.

Several papers seem to say the same thing. Check the comparison table before merging them in your prose. Similar labels can hide different definitions and procedures.

For your next paper, open the research-paper tool, generate one draft, and complete its source note before moving on. If you are using the map for course revision rather than a review chapter, the study workflows show how to turn checked branches into practice questions.

Frequently asked questions

Can MindLM combine several PDFs into one literature review?

No automatic multi-PDF synthesis is provided in this workflow. Generate one map per paper, verify each against its source, then build the comparison and writing outline in an external note editor.

Can I try this literature-review workflow on Free?

Yes. Free supports PDF input, node renaming, and Markdown export. It includes 10 signup credits, 1 credit per daily login, and at most 3 credit-funded generations a day. Each run needs sufficient credits; adding or deleting nodes requires Pro or Max.

Should I map every PDF I download?

Choose papers relevant to your review question first. You can also map a borderline paper to examine it, but a generated outline does not replace your inclusion decision or a required screening record.

Does Markdown export include verified citations or Zotero records?

No. It exports the saved outline. Add the source URL, file version, citation key, and page or table references yourself, and manage citations in your reference manager.

What should I do when the map differs from the paper headings?

Compare the branches with the source. Generation can regroup or omit content, and extraction or text limits can also leave material out. Check missing sections in the PDF, rename unclear labels, and record unresolved issues in your reading note.

Can I edit the exported outline in Obsidian?

Yes. Place the downloaded Markdown file in your vault and edit it as a plain-text note. It does not automatically become a visual map, and edits do not sync back to MindLM.