Thesaurus Linguae Graecae®
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Parallel Browsing

Parallel Browsing displays two passages side by side. The new interface offers three modes: Browse Two Texts, Highlight similarities, and Compare Editions.

1. Choose a Parallel Browsing mode

Open Browse Texts → Parallel. Enter the first and second author or TLG ID in the fields at the top of the page. Use the center menu to select the type of comparison, then choose Go.

TLG Parallel Browsing landing page with fields for first and second authors and a menu offering Browse Two Texts, Highlight similarities, and Compare Editions.
Parallel Browsing landing page: select the two texts and choose one of the three comparison modes.

Browse Two Texts

Display any two selected texts side by side and navigate each text independently.

Highlight similarities

Compare two texts while TLG identifies and highlights similar expressions.

Compare Editions

Compare two editions of the same work and identify differences between them.

2. Browse Two Texts

This option allows you to read any two TLG texts side by side. Each pane retains the normal Browser controls, so you can move directly to a location in either text and use Text Structure when available.

Parallel Browsing showing Homer's Iliad on the left and Scholia in Iliadem on the right, with separate navigation and Text Structure controls.
Browse Two Texts: Homer’s Iliad and the Scholia in Iliadem displayed side by side.
  1. Select the first author and work in the left field.
  2. Select the second author and work in the right field.
  3. Choose Browse Two Texts and click Go.
  4. Use the citation controls above each text to navigate to the desired passage.
Independent navigation: The two panes have their own citation controls. In the example, the Iliad is navigated by book and line, while the scholia use book, verse, and line of scholion.

3. Highlight similarities

Select Highlight similarities to compare two texts and locate similar expressions. Matching language is highlighted in both panes, allowing the passages to be examined in context.

Parallel Browsing in Highlight similarities mode with matching phrases highlighted in Homer's Iliad and the Scholia in Iliadem and a Next Match button above the left text.
Highlight similarities: corresponding expressions are highlighted in the two texts.
  1. Select the two texts you want to compare.
  2. Choose Highlight similarities and click Go.
  3. Review the highlighted expressions in both text panes.
  4. Use Next Match to move to the next identified similarity.
How this relates to N-grams: The previous TLG help describes Highlight Similarities as an expanded version of the N-grams feature. It is intended for comparison of similar wording across two selected texts.

4. Compare Editions

Use Compare Editions when the TLG contains more than one edition of the same text. The two editions are displayed side by side and differences are highlighted for rapid comparison.

Parallel Browsing in Compare Editions mode showing two editions of Homer's Iliad side by side with textual differences highlighted and a Next Match button.
Compare Editions: two editions of Homer’s Iliad are displayed side by side and variant readings are highlighted.
  1. Choose Compare Editions.
  2. Enter or select the author in the author field.
  3. Select the edition for each side from the available work/edition choices.
  4. Click Go to display the editions side by side.
  5. Use Next Match to move to the next highlighted difference.
Availability: Compare Editions applies only to works for which the TLG contains multiple editions.

5. Features shared by the three modes

Navigation and citation

  • Each text appears in its own pane.
  • Use the citation controls above a text to move to another location.
  • Text Structure provides structured navigation when available.
  • Cite this work provides citation information for the displayed work.

Comparison controls

  • The comparison mode can be selected from the menu centered above the texts.
  • Next Match is available in the similarity and edition-comparison views shown here.
  • Highlighted text identifies the language relevant to the selected comparison.

6. Quick reference

Browse Two Texts

Best for reading and navigating two passages side by side without an automated comparison.

Highlight similarities

Use when you want TLG to locate similar expressions in two selected texts.

Compare Editions

Use when two TLG editions of the same work are available and you want to identify textual differences.