The 20-route learning estate
eduKateSengkang is organised as a Learning Castle: existing subject hubs, level routes, examination routes and learning-system pages retain their jobs. This page is the master upgrade directory. It does not replace those owners. It makes the work visible, assigns every upgrade to one route, and gives new or substantially revised articles stable IDs so later batches can be connected without losing track of what is complete.
Numbering rule
Each route has a -000 hub pointer. Article slots then use reserved tens: -010, -020, -030 and so on. The first upgrade programme reserves up to 150 article slots per route, ending at -1500. Existing high-value URLs are upgraded in place wherever practical; the ID identifies the editorial job, not a requirement to create a new URL.
| Route | Hub ID | Primary job | Existing owner / destination | Reserved article IDs | Status |
|---|---|---|---|---|---|
| SK-01 | SK-01-000 | Homepage, Sengkang Tuition, commercial/navigation/root accuracy | Homepage / Tuition Centre owner | SK-01-010–SK-01-1500 | OPEN |
| SK-02 | SK-02-000 | Primary 1–3 English | Primary English Learning Hub | SK-02-010–SK-02-1500 | OPEN |
| SK-03 | SK-03-000 | Primary 4–6 English + PSLE English | Primary English Learning Hub / PSLE Learning Guide | SK-03-010–SK-03-1500 | OPEN |
| SK-04 | SK-04-000 | Secondary 1–2 English | English Hub | SK-04-010–SK-04-1500 | OPEN |
| SK-05 | SK-05-000 | Secondary 3–4 English + SEC English | English Hub | SK-05-010–SK-05-1500 | OPEN |
| SK-06 | SK-06-000 | Vocabulary, grammar, reading, writing and English skills | Complete English Index | SK-06-010–SK-06-1500 | OPEN |
| SK-07 | SK-07-000 | Primary 1–3 Mathematics | Mathematics Hub | SK-07-010–SK-07-1500 | OPEN |
| SK-08 | SK-08-000 | Primary 4–6 Mathematics + PSLE Mathematics | Mathematics Hub / PSLE Learning Guide | SK-08-010–SK-08-1500 | OPEN |
| SK-09 | SK-09-000 | Secondary 1–2 Mathematics | Mathematics Hub | SK-09-010–SK-09-1500 | OPEN |
| SK-10 | SK-10-000 | Secondary 3–4 Mathematics + SEC Mathematics | Mathematics Hub | SK-10-010–SK-10-1500 | OPEN |
| SK-11 | SK-11-000 | Additional Mathematics | Additional Mathematics owner | SK-11-010–SK-11-1500 | OPEN |
| SK-12 | SK-12-000 | Primary 3–4 Science | Science Hub | SK-12-010–SK-12-1500 | OPEN |
| SK-13 | SK-13-000 | Primary 5–6 Science + PSLE Science | Science Hub / PSLE Science Learning Guide | SK-13-010–SK-13-1500 | OPEN |
| SK-14 | SK-14-000 | Secondary Science + scientific reasoning | Science Hub | SK-14-010–SK-14-1500 | OPEN |
| SK-15 | SK-15-000 | Learning Castle, Learning Runtime and study methods | Learning Runtime Hub | SK-15-010–SK-15-1500 | OPEN |
| SK-16 | SK-16-000 | Examination performance, revision, assessment and error repair | Examination Craft | SK-16-010–SK-16-1500 | OPEN |
| SK-17 | SK-17-000 | Parent guides, tuition, teaching and student support | Parents’ Guide | SK-17-010–SK-17-1500 | OPEN |
| SK-18 | SK-18-000 | Algorithms, computing and advanced mathematics | Algorithms & Computing Hub | SK-18-010–SK-18-1500 | OPEN |
| SK-19 | SK-19-000 | Advanced science and world-knowledge science material | Complete Science Index | SK-19-010–SK-19-1500 | OPEN |
| SK-20 | SK-20-000 | Estate archaeology: duplication, location leakage, orphan control, cannibalisation and consolidation candidates | Learning Castle Registry | SK-20-010–SK-20-1500 | OPEN |
Article register
The first-wave titles and status ledger are live in the eduKate Sengkang Article Register | SK-01 to SK-20. Use it to claim the next article ID, see protected owners and avoid duplicating work already active in another branch.
Protection-first reader standard
All 20 branches now follow the eduKate Sengkang Reader Experience Standard: protect strong pages, connect isolated pages, improve formatting only where it helps, use bounded surgery for specific defects, and modernise only when the existing article no longer completes its reader job.
Article state
Every inspected URL receives one state before work begins: PROTECT for ranking or strategically sensitive owners; KEEP for sound pages needing no substantial rewrite; MODERNISE for useful but outdated pages; SURGERY for small bounded repairs; RETARGET for pages that need a distinct adjacent search job; CONSOLIDATION CANDIDATE for overlapping intent that requires owner review; LOCATION LEAKAGE for misplaced locality; or HISTORICAL for material worth preserving without major reinvestment.
Completion rule
An article ID becomes complete only when the assigned existing URL or new article has a defined reader job, correct owner, current factual scope, useful internal return path and no unresolved collision with another Sengkang owner. A branch can therefore inspect more than 150 URLs without rewriting 150 pages. The 150 slots are a controlled first-wave capacity, not a quota.
Castle relationship
This programme sits under the existing Learning Castle and follows its one-owner-many-routes rule. English, Mathematics, Science, Examination Craft, Learning Runtime and Algorithms retain their existing canonical roles. The master directory exists to coordinate upgrades and make unfinished work visible; it does not create twenty competing subject hubs.
Complete-index crosswalk
Use the 20 routes above to decide ownership and upgrade work. Use these Complete Archives when the job is enumeration, orphan control or direct deep-article discovery.
English Archive · Mathematics Archive · Science Archive · Examination Archive · Learning Runtime Archive · Algorithms & Computing Archive
Deep fallback discovery
The subject hubs and Complete Archives remain the preferred routes. These live indexes are the final orphan-control layer: they expose every published Page and Post through paginated internal links so newly published or unusually placed content still has a crawlable return path while specialist routing is updated.
Browse every published Page
2756 results found
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100 Primary English Tips Rebuilt as 10 Language Capabilities | Darwin × Voyage
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100 Primary Mathematics Tips Rebuilt as 10 Capabilities | Darwin × Voyage
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100 Primary Science Tips Rebuilt as 10 Scientific Capabilities | Darwin × Voyage
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7 Mathematics Strategies That Survive Unfamiliar Questions
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A Capability Profile Without Labelling the Child | Evidence, Support Conditions and the Next Learning Move
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A Workable Weekday Routine for P4 to P6: School, Rest, Screens, Study
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Accessible Learning Tasks Without Silent Target Changes | Change Access, Preserve the Learning Goal
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Accessible Learning Tasks Without Silent Target Changes | Preserve the Learning Goal While Changing Access
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Additional Mathematics Challenging Questions | An Advanced Worked Workshop
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Additional Mathematics Classroom | Chapter 10: Differentiation — Gradient Functions, Power/Product/Quotient/Chain Rules, Tangents, Normals and Rates | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 11: Further Applications of Differentiation — Increasing/Decreasing Functions, Stationary Points, First/Second Derivative Tests and Optimisation | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 12: Differentiation of Trigonometric, Exponential and Logarithmic Functions — Advanced Chain Rule, Tangents, Rates and Optimisation | SEC G3 K341
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Additional Mathematics Classroom | Chapter 13: Integration — Reverse Differentiation, Constants, Linear-Factor Integrals and G3 Trigonometric/Exponential/Logarithmic Extension | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 14: Applications of Integration — Definite Integrals, Signed Accumulation, Area Under Curves and Axis Crossings | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 15: Kinematics — Displacement, Velocity, Acceleration, Direction Changes, Total Distance and Motion Through Calculus | SEC G3 K341
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Additional Mathematics Classroom | Chapter 1: Simultaneous Equations, Polynomials and Partial Fractions | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 2: Quadratic Functions, Discriminants, Inequalities and Line–Curve Conditions | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 3: Binomial Theorem, General Terms and Coefficient Reasoning | SEC G3 K341
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Additional Mathematics Classroom | Chapter 4: Surds, Exact Algebra and Rationalising Denominators | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 5: Exponential and Logarithmic Functions, Laws, Equations, Graphs and Models | SEC G3 K341
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Additional Mathematics Classroom | Chapter 6: Coordinate Geometry in Two Dimensions — Lines, Midpoints, Rectilinear Areas and Circles | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 7: Linear Law, Straight-Line Transformations, Parameter Recovery and Model Testing | SEC G3 K341
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Additional Mathematics Classroom | Chapter 8: Trigonometric Functions, Graphs, Identities, Formulae and Equations | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 9: Proofs in Plane Geometry — Parallel Lines, Congruence, Similarity, Midpoint and Tangent–Chord Reasoning | SEC G3 K341
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Additional Mathematics Classroom | Complete Chapter-by-Chapter SEC 2027 Route | G2 K232 / G3 K341
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Additional Mathematics Learning Hub | Secondary 3–4 A-Math Guides
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Additional Mathematics Strategies | Build the Algebra Route Before Speed
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Additional Mathematics Study Guide | SEC G2 & G3, Topics and Worked Examples
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Additional Mathematics Tuition Punggol | Secondary 3–4 A-Math | The Voyage Series
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Additional Mathematics Tuition Sengkang | S3–S4 Learning System
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Additional Mathematics Word Problems | Worked Examples from Situations to Equations and Calculus
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Algorithms & Computing Hub | From First Principles to Professional Systems
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Algorithms Learning Roadmap | Trace, Reconstruct, Design and Evaluate
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Algorithms Quartermaster | Methods, Tools and Representations Agent
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Alicia’s First Secondary 1 Report
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Anchor Green Primary School: A Parent’s Learning Guide
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Anomaly | When Learning Behaves Differently Than Expected
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Archivist | Index, Enumeration and Orphan-Control Agent
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Arrival State | What Has Actually Arrived at the Tutorial?
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Assembly and Configuration | Putting the Right Supports Around the Learner
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Baseline Before Intervention | Marie Curie Series | What Could the Learner Do Before We Changed Anything?
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Beatrice’s PSLE Week
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Becoming a Private Tutor in Singapore | Professional, Business, Tax, Privacy and Home-Tuition Responsibilities
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Before the First Tuition Lesson in Sengkang | What Parents Should Prepare
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Biochemistry, Metabolism & Molecular Homeostasis | Cofactors, Metals, Lipids and Flux
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Biology & Living Systems | Cells, Organisms, Structure and Function
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Bridgekeeper | Cross-Fort Handoff Agent
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Cape Canaveral Series | The Learning Place Where Preparation Becomes Independent Motion
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Career & Workplace Literacy Tutor | Curie Series | Understanding How Work Systems Change
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Career Change & Reinvention Tutor | Curie Series | Moving Capability Into a New Field
Browse every published Post
3746 results found
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PSLE Science Reality Lab Vol No.072 | “Removes 99%” — 99% of What Was There at the Start, and What Is Left?
10–15 minutes -
PSLE Science Reality Lab Vol No.071 | “Tested for 10,000 Cycles” — Does an Accelerated Test Prove Years of Normal Use?
11–17 minutes -
PSLE Science Reality Lab Vol No.070 | “Three Sensors Agree” — Can They All Share the Same Bias?
12–18 minutes -
The Tutor Handbook Vol No.0107 | The Peer Baseline Trap — How a Tutor Uses Three Learners Together Without Letting the Fastest Student Become the Standard for Everyone Else
16–24 minutes -
The Tutor Handbook Vol No.0106 | The Evidence Source Gate — How a Tutor Decides Whether Research, Guidance, a Vendor Claim or a Viral Teaching Idea Deserves a Trial
16–24 minutes -
The Tutor Handbook Vol No.0105 | The Tutor Capacity Boundary — How a Tutor Protects Enough Preparation, Observation and Follow-Up Attention Before Taking On More Learners or More Work
17–26 minutes -
The Tutor Handbook Vol No.0104 | The AI Material Verification Gate — How a Tutor Uses Generative AI to Draft Questions, Explanations and Feedback Without Letting Unverified Output Reach the Learner
19–29 minutes -
PSLE Science Reality Lab Vol No.069 | “This Time-Lapse Shows Fast Change” — Did the Video Speed Change the Apparent Rate?
9–13 minutes -
PSLE Science Reality Lab Vol No.068 | “The Result Is Robust” — Did It Survive Other Reasonable Ways of Analysing the Same Data?
11–16 minutes -
PSLE Science Reality Lab Vol No.067 | “Within Tolerance” — Does Passing the Limit Mean the Measurement Is Exactly on Target?
8–13 minutes -
PSLE Science Reality Lab Vol No.066 | “This Image Was Enhanced” — Did Processing Reveal a Feature or Create an Artifact?
11–16 minutes -
The Tutor Handbook Vol No.0103 | The Coaching Focus Gate — How a Tutor Coach Chooses One High-Leverage Teaching Move to Improve Without Turning Observation Into a Checklist
22–33 minutes -
The Tutor Handbook Vol No.0102 | The Preparation–Adaptation Boundary — How a Tutor Plans a Coherent Lesson Without Pre-Deciding What the Learner Will Need
12–18 minutes -
The Tutor Handbook Vol No.0101 | The Expectation Reset — How a Tutor Stops Old Labels, Previous Marks and First Impressions From Deciding What Fresh Work Means
14–21 minutes -
The Tutor Handbook Vol No.0100 | The Task Purity Check — How a Tutor Separates the Target Skill From Reading Load, Format, Memory Demand and Other Hidden Requirements Before Calling the Skill Weak
16–24 minutes -
PSLE Science Reality Lab Vol No.065 | “Open Data Available” — Does That Mean the Result Has Already Been Reproduced?
9–14 minutes -
PSLE Science Reality Lab Vol No.064 | “The Data Were Adjusted” — What Was Changed, and Why?
9–14 minutes -
PSLE Science Reality Lab Vol No.063 | “Vegetation Health Index” — Did the Satellite Measure Plant Health Directly?
9–14 minutes -
PSLE Science Reality Lab Vol No.062 | “30 m Resolution” — Does One Pixel Describe a Single Point or a Whole Patch?
11–16 minutes -
The Tutor Handbook Vol No.0099 | The Question Return Gate — How a Tutor Decides When to Answer a Learner’s Question, Clarify It, or Hand Part of It Back for Independent Thinking
18–27 minutes -
The Tutor Handbook Vol No.0098 | The Revoicing Boundary — How a Tutor Restates a Learner’s Thinking Without Quietly Upgrading a Weak Answer Into a Strong One
17–26 minutes -
The Tutor Handbook Vol No.0097 | The Follow-Up Question — How a Tutor Responds to a Partly Correct Answer Without Feeding the Learner the Route
18–27 minutes -
The Tutor Handbook Vol No.0096 | The Correction Load Gate — How a Tutor Chooses Which Errors to Correct Now Without Turning One Piece of Work Into an Unusable Wall of Feedback
20–29 minutes -
PSLE Science Reality Lab Vol No.061 | “Near Real-Time Data” — Is This the Final Science-Quality Result?
9–14 minutes -
PSLE Science Reality Lab Vol No.060 | “10,000 Sightings on the Map” — Did People Look Equally Everywhere?
10–14 minutes -
PSLE Science Reality Lab Vol No.059 | “Warmest on Record” — Does Rank Tell You How Big the Difference Was?
6–8 minutes -
The Tutor Handbook Vol No.0095 | The Evidence Freshness Window — How a Tutor Decides When a Correct Answer Is Too Close to Teaching, Hinting or Rehearsal to Count as Independent Learning
17–26 minutes -
PSLE Science Reality Lab Vol No.058 | “2°C Warmer Than Normal” — Normal Compared With Which Years?
8–12 minutes -
The Tutor Handbook Vol No.0094 | The Peer Answer Leakage Boundary — How a Tutor Uses Student Discussion Without Destroying the Next Learner’s Independent Evidence
17–26 minutes -
The Tutor Handbook Vol No.0093 | The Cue Validity Check — How a Tutor Separates Evidence of the Target Skill From Distracting Signals Such as Neatness, Confidence, Effort and Familiarity
15–23 minutes -
The Tutor Handbook Vol No.0092 | The Disconfirmation Check — How a Tutor Tests a Competing Explanation Before Committing More Time to the Current Diagnosis
15–23 minutes -
PSLE Science Reality Lab Vol No.057 | “10.0 ± 0.5” — Does the ± Part Matter to the Claim?
8–12 minutes -
PSLE Science Reality Lab Vol No.056 | “Observed Every Two Days” — Was the Land Being Watched Continuously?
9–13 minutes -
PSLE Science Reality Lab Vol No.055 | “Representative Image” — How Was This One Picture Chosen From the Whole Experiment?
9–14 minutes -
PSLE Science Reality Lab Vol No.054 | “Calibrated Last Month” — Does That Guarantee Today’s Reading Is Still Right?
8–12 minutes -
The Tutor Handbook Vol No.0091 | The Observation Window — How a Tutor Coach Collects Enough Live Teaching Evidence Before Giving Feedback Without Turning the Lesson Into Performance Theatre
15–23 minutes -
The Tutor Handbook Vol No.0090 | The Interrupted Route — How a Tutor Restarts Learning After Missed Sessions Without Cramming, Resetting or Mistaking Absence for Forgetting
19–29 minutes -
The Tutor Handbook Vol No.0089 | The Diagnostic Probe — How a Tutor Designs One Question That Separates Competing Explanations Without Teaching the Answer
16–24 minutes -
The Tutor Handbook Vol No.0088 | The Tutor Reassignment Gate — How a Tutor Decides When Consistency Should Yield to a Better Fit Without Resetting the Learner
18–27 minutes -
PSLE Science Reality Lab Vol No.053 | “One Test Worked” — How Many Other Tests Were Tried?
11–16 minutes -
PSLE Science Reality Lab Vol No.052 | “Randomized Test” — What Was Actually Random?
10–15 minutes -
PSLE Science Reality Lab Vol No.051 | “Tested by an Accredited Laboratory” — Accredited for This Exact Test?
10–15 minutes -
PSLE Science Reality Lab Vol No.050 | “Traceable to a National Standard” — Does That Mean the Product Is Endorsed?
11–17 minutes -
The Tutor Handbook Vol No.0087 | The Evidence Triangulation Check — How a Tutor Combines School Results, Session Work and Learner Reports Without Averaging Unlike Evidence Into a Fake Score
17–26 minutes -
The Tutor Handbook Vol No.0086 | The Participation Differential — How a Tutor Separates Confusion, Access Barriers, Overload and Avoidance Before Calling a Learner Disengaged
17–25 minutes -
The Tutor Handbook Vol No.0085 | The Relationship Repair — How a Tutor Rebuilds Working Trust After Friction Without Lowering the Learning Standard
17–26 minutes -
The Tutor Handbook Vol No.0084 | The Dosage Differential — How a Tutor Distinguishes Too Little Tutoring From the Wrong Tutoring Before Adding More Sessions
18–27 minutes -
PSLE Science Reality Lab Vol No.049 | “The Test Found Nothing” — Did a Positive Control Show It Could Find Something?
12–18 minutes -
PSLE Science Reality Lab Vol No.048 | “The Trend Jumps Here” — Did the Measuring Method Change?
9–13 minutes -
PSLE Science Reality Lab Vol No.047 | “Three Studies Agree” — Did They All Use the Same Dataset?
9–14 minutes
Routing rule: use this fallback only for discovery and orphan control. Canonical subject ownership, reader pathways and return logic continue to come from the Learning Castle, subject hubs and Complete Archives.
