Compare backlink counts
Only in A/B means absent from the other supplied file, not absent from the web or proven new/lost. Overlap is not accuracy, precision or recall: there is no verified complete universe here. Equal totals can contain different domains.
- Target URL
- https://brand.example/ · Grouped domain and subdomains
- A · Data source
- A · 2026-10-20 · A.csv
- Source scope and filters
- Fictional same-target teaching subset; all supplied attributes retained; not a provider export or complete web index.
- B · Data source
- B · 2026-10-20 · B.csv
- Source scope and filters
- Fictional same-target teaching subset; all supplied attributes retained; not a provider export or complete web index.
- Summary and limitations
URLs use browser normalization. Observation identity preserves fragments and exact anchor/attribute text. Pair and document units remove fragments but keep queries, paths and protocols. Domains use the Public Suffix List including private suffixes; that is a grouping rule, not proof of shared ownership. No redirects or canonical URLs are resolved.
| Metric | A | B |
|---|
| Input records | 12 | 8 |
|---|
| Invalid URLs | 0 | 0 |
|---|
| Repeated records | 1 | 0 |
|---|
| Same-domain sources | 1 | 1 |
|---|
| Outside target scope | 1 | 0 |
|---|
| Export observations | 9 | 7 |
|---|
Counting unit
| Counting unit | A | B | Both files | Only in A | Only in B | Union |
|---|
| Export observations | 9 | 7 | 4 | 5 | 3 | 12 |
|---|
| Source–target pairs | 7 | 6 | 5 | 2 | 1 | 8 |
|---|
| Source documents | 6 | 5 | 4 | 2 | 1 | 7 |
|---|
| Source hosts | 5 | 4 | 3 | 2 | 1 | 6 |
|---|
| Referring domains | 4 | 4 | 3 | 1 | 1 | 5 |
|---|
Referring domains
| Key | File presence | A · Record references | B · Record references |
|---|
| archive.example | Only in A | 10 | |
|---|
| fresh.example | Only in B | | 5 |
|---|
| other.example | Both files | 6 | 3 |
|---|
| paper.example | Both files | 1, 3, 4, 5, 9, 12 | 1, 2, 6, 8 |
|---|
| partner.example | Both files | 8 | 4 |
|---|
Exclusion log
| Data source | Record references | Exclusion log |
|---|
| A | 2 | Repeated records |
| A | 7 | Same-domain sources |
| A | 11 | Outside target scope |
| B | 7 | Same-domain sources |
Changing inputs invalidates the comparison. Unit changes recalculate the grouping. Search and pagination affect only displayed rows; CSV and HTML contain the entire selected unit. JSON restores inputs, not display filters. Missing-file membership remains distinct from zero observed links.