# Lunr > Lunr is engineering document management and a common data environment (CDE) for asset owners. It puts every DWG, DGN, RVT, and PDF under revision control, searches the text inside scanned drawings with XRAY, opens CAD and BIM models in the browser, and takes contractor handover that arrives complete, holding the drawing record from project delivery through decades of operation. Built by Lunr Labs Pty Ltd in Melbourne, Australia, and hosted in Australia and the US. ## Product - [Engineering document control and CDE for asset owners](https://www.lunr.app/): Put every DWG, DGN, and RVT under revision control, search the text inside scanned drawings with XRAY, and take contractor handover that arrives complete. Cloud CDE for asset owners, from project delivery through decades of operation. Over 10 million documents under management. Hosted in Australia and the US. - [Watch the Lunr overview](https://www.lunr.app/overview): A short overview of Lunr in motion. Watch one drawing come under revision control, turn up in an XRAY search, and move through handover with its record intact. The overview runs one minute and eighteen seconds. - [Document control, search, and viewing](https://www.lunr.app/features): Put every DWG, DGN, and RVT under revision control, search the text inside scanned drawings with XRAY, view and mark up drawings and models in the browser, and find geo-tagged documents on a map. The capabilities behind Lunr's engineering document management. - [Search scanned drawings with XRAY](https://www.lunr.app/features/xray): Search the text inside scanned drawings and CAD documents. XRAY runs OCR and AI full-text across every DWG, DGN, RVT, PDF, and scanned image you store, and Deep XRAY re-scans dense drawings tile by tile to surface the hits a single pass misses. - [Configurable document workflows](https://www.lunr.app/features/workflows): Match your process with a visual workflow editor. Draw the states, actions, and transitions a document moves through, run a workflow on one document or a whole batch, and keep a full workflow audit trail. Configured and run by your own team. - [Handover, transmittals, and change requests](https://www.lunr.app/features/handover): Take contractor handover that arrives complete. Validate every package against a manifest, parse title-block tags into metadata, issue tracked transmittals, and run change requests with holds, reviewer nomination, and packages, on an audit log that writes itself. - [View DWG, PDF, and IFC in the browser](https://www.lunr.app/try): Open DWG, DGN, PDF, Word, Excel, and IFC in a browser tab with Lunr's viewers. View, measure, mark up, and compare drawings, read Office files, and navigate BIM models with clipping planes. No CAD licence, no download, no plugin. - [Mobile apps for iOS and Android](https://www.lunr.app/apps): Take the controlled drawing record on site with Lunr for iPhone and Android. Scan the QR in a printed title block to open the current revision, download a collection of documents for offline access, view PDFs, read RFIs and change requests, and move a document through its workflow from where you stand. - [Connectors](https://www.lunr.app/connectors): Connect Lunr to the systems you already run: read-write CAD APIs for DWG, DGN, and Revit, Esri GIS layers and ArcGIS search, and university facility management integrations for Archibus, MazeMap, SISfm, and OneDrive. - [Book a demo](https://www.lunr.app/demo): Book a working demo of Lunr with someone who knows what a transmittal and an as-constructed set are. See XRAY search the text inside a scanned drawing, on your formats. We reply within one business day. ## Solutions - [Drawing management software for asset owners](https://www.lunr.app/drawing-management-software): Drawing management software that puts every DWG, DGN, RVT, and PDF under revision control, searches inside scanned drawings, and opens them in the browser. - [Engineering document management system (EDMS)](https://www.lunr.app/engineering-document-management): An engineering document management system holds every controlled document, from DWG and PDF to Word and Excel, as a numbered, revisioned record with a full audit trail. - [Document control software for engineering teams](https://www.lunr.app/document-control): Engineering document control software that keeps controlled documents in one register, with revision control, approvals, transmittals, and a full audit trail. - [Common data environment software for asset owners](https://www.lunr.app/common-data-environment): Common data environment software that holds one agreed source of information, runs ISO 19650 states and approvals, and keeps the record after handover. - [Implementation and data migration](https://www.lunr.app/implementation): How a Lunr implementation runs: solution design workshops, a signed-off sandbox migration, UAT in a test environment, then production cutover with training and hypercare. ## Compare - [Compare engineering document management systems](https://www.lunr.app/compare): Compare Lunr with SharePoint, Aconex, ProjectWise, Autodesk Docs, Procore, OpenText, Synergis Adept, TeamBinder, 12d Synergy, Autodesk Vault, M-Files, and RedEye. Neutral, tool-by-tool framing for asset owners choosing where the engineering drawing record lives. - [Engineering document management software compared](https://www.lunr.app/engineering-document-management-software): A survey of the engineering document management software asset owners shortlist, from SharePoint and Aconex to ProjectWise, Autodesk Docs, Adept, and Lunr, with the criteria that decide where a drawing record lives. - [Oracle Aconex alternative for asset owners](https://www.lunr.app/compare/aconex): An Oracle Aconex alternative for the asset owner. Aconex runs project delivery. Lunr takes the controlled set at handover and keeps it live for decades of operation. Compare the alternatives owners weigh. - [Bentley ProjectWise alternative for asset owners](https://www.lunr.app/compare/projectwise): A Bentley ProjectWise alternative built for asset owners. Hold the issued drawing record in the browser, control revisions, and search inside scans, without running design work-in-progress workspaces. Compare the alternatives owners shortlist. - [Autodesk Docs alternative for asset owners](https://www.lunr.app/compare/autodesk-docs): An Autodesk Docs alternative built for the operations phase. Hold every DWG, RVT, DGN, and MicroStation drawing under revision control for the life of the asset, and keep Autodesk Docs for live projects. - [Procore alternative for engineering document control](https://www.lunr.app/compare/procore): A Procore alternative for asset owners. Purpose-built engineering document control for the operating record, with handover validation, a controlled drawing register, and OCR search across every drawing. Keep Procore for the build. - [OpenText alternative for engineering drawings](https://www.lunr.app/compare/opentext): An OpenText alternative built for the drawing record. CAD-native viewing in the browser, XRAY search inside scanned drawings, and real revision conventions, without the weight of a general ECM. - [SharePoint alternative for engineering drawings](https://www.lunr.app/compare/sharepoint): A SharePoint alternative built for engineering drawings. Put DWG, DGN, and RVT under revision control, search inside scans, and keep SharePoint for the rest. - [Synergis Adept alternative for asset owners](https://www.lunr.app/compare/adept): A Synergis Adept alternative for asset owners. Hold the drawing record in the browser, with no Windows Server or SQL Server to run, no licence tiers deciding what people may do, and OCR search inside scanned sheets. - [TeamBinder alternative for asset owners](https://www.lunr.app/compare/teambinder): A TeamBinder alternative for the asset owner. TeamBinder, now InEight Document, runs project delivery. Lunr takes the controlled set at close-out and keeps it live for decades of operation, hosted in Australia. - [12d Synergy alternative for asset owners](https://www.lunr.app/compare/12d-synergy): A 12d Synergy alternative for asset owners. Hold the engineering record in the browser for the life of the asset, with no Windows client to deploy, no Windows Server or SQL Server to run, and OCR search inside scanned sheets. Hosted in Australia. - [Autodesk Vault alternative for asset owners](https://www.lunr.app/compare/autodesk-vault): An Autodesk Vault alternative for asset owners. Hold the issued drawing record in the browser, with no Windows Server or SQL Server to run and no Windows client to deploy, and search the text inside scanned legacy sheets. Keep Vault for CAD data management at the design desk. - [M-Files alternative for engineering drawings](https://www.lunr.app/compare/m-files): An M-Files alternative built for the drawing record. Drawing numbers and revisions are first-class, DWG, DGN, and RVT open in the browser, and XRAY reads the text inside scanned sheets, with no vault to configure first. - [RedEye alternative for engineering drawing management](https://www.lunr.app/compare/redeye): A RedEye alternative for asset owners. RedEye, now an Accruent product, runs cloud engineering document management. Lunr holds one controlled register for the life of the asset, with browser viewing, revision control, and OCR search inside scanned sheets. ## Industries - [Document management for water authorities](https://www.lunr.app/for/water): Engineering document management for water authorities. Treatment plants, pump stations, and network assets with drawings kept for decades under revision control, searchable back through the scanned archive, and complete at contractor handover. Hosted in Australia and the US. - [Document management for rail operators](https://www.lunr.app/for/rail): Rail document management for corridors, signalling, and structures. Decades of drawings under revision control, XRAY search inside scanned legacy drawings, hosted in Australia and the US. - [Document management for airports](https://www.lunr.app/for/airports): Airport document management for airfield, terminals, and services. Decades of drawings under revision control, XRAY search inside scanned drawings, hosted in Australia and the US. - [Document management for mining operators](https://www.lunr.app/for/mining): Mining document management for mine sites and processing plants. Decades of drawings under revision control, XRAY search inside scanned plant drawings, contractor handover at every expansion, and closure records that outlive the mine. Hosted in Australia and the US. - [Document management for hospitals and healthcare](https://www.lunr.app/for/healthcare): Engineering document management for hospitals and health services. Engineering services drawings for a hospital campus under revision control, searchable back through the scanned archive, and complete through constant refurbishment. Hosted in Australia and the US. - [Document management for local councils](https://www.lunr.app/for/local-government): Engineering document management for local government. Civic buildings, roads, and drainage assets with drawings kept for decades under revision control, searchable back through the inherited scanned archive, and complete at contractor handover. Hosted in Australia and the US. - [Document management for university estates](https://www.lunr.app/for/universities): Lunr manages the engineering drawings a university campus estate keeps for decades: DWG, DGN, and RVT under revision control, XRAY search across scanned archives, map discovery on campus plans, and contractor handover per project. The University of Canberra moved 20,000+ documents off SharePoint to Lunr. - [Document management for utilities and energy](https://www.lunr.app/for/utilities-energy): Lunr is the engineering document register for utilities and energy asset owners: networks and plants documented across decades, controlled documents with a full audit trail for compliance, geo-search across a distributed network, and export anytime. Works alongside your EAM. Hosted in Australia and the US. - [Document management for government and councils](https://www.lunr.app/for/government): Government document management for councils and agencies. Drawings for roads, water, and buildings under revision control, hosted in Australia and the US. - [Engineering document management for manufacturing](https://www.lunr.app/for/manufacturing): Engineering document management for manufacturing plants. Mechanical, electrical, P&ID, and layout drawings under revision control, the current revision at the machine on a QR scan, OEM drawings searchable inside the sheet, and handover checked on every equipment project. Hosted in Australia and the US. - [Document management for life sciences facilities](https://www.lunr.app/for/life-sciences): Engineering document management for life sciences facilities. Cleanroom layouts, HVAC, water systems, and process and instrumentation diagrams for a pharmaceutical plant, laboratory, or biotech site, under revision control with a full audit trail and superseded revisions kept. Hosted in Australia and the US. ## Glossary - [Document control glossary: drawing and revision terms defined](https://www.lunr.app/glossary): Plain definitions of the terms behind the engineering drawing record: transmittals, drawing registers, revision control, as-constructed drawings, title blocks, document numbering, superseded drawings, controlled documents, ISO 19650, and issued for construction. - [What is a transmittal? Definition and how it works](https://www.lunr.app/glossary/transmittal): A transmittal is the formal, recorded issue of controlled drawings or documents to another party, with a cover sheet listing every file and its revision. How transmittals work, and how Lunr records them. - [What is a drawing register?](https://www.lunr.app/glossary/drawing-register): A drawing register is the master index of every drawing on a project or asset, recording each drawing's number, title, and current revision in one controlled list. - [What is revision control?](https://www.lunr.app/glossary/revision-control): Revision control is the discipline of tracking each iteration of a drawing so everyone works from the current version and superseded versions stay on the record. How it works, and how Lunr handles it. - [What are as-constructed drawings?](https://www.lunr.app/glossary/as-constructed-drawings): As-constructed drawings are drawings updated to reflect what was actually built or installed, handed over as the record set at project completion. What they are, who produces them, and why asset owners rely on them. - [What is a title block? Its 7 fields, and where it sits](https://www.lunr.app/glossary/title-block): A title block is the framed panel on a drawing sheet that holds its identifying metadata. See the seven fields it prints, where it sits on the sheet, and how it differs from a drawing register. Includes a free drawing register template for the fields the title block prints. - [What is a submittal package?](https://www.lunr.app/glossary/submittal-package): A submittal package is a batch of drawings or documents delivered together for review or handover, checked against the drafting standard before it is accepted. How it works for asset owners, and how Lunr validates it. - [What is an asset hierarchy?](https://www.lunr.app/glossary/asset-hierarchy): An asset hierarchy is the structured breakdown of a physical asset into systems and components, used to tag and retrieve the documents that belong to each part. - [What is a redline markup?](https://www.lunr.app/glossary/redline-markup): A redline markup is an annotation layered over a drawing to flag an error or request a change, triggering a revision without altering the released file. - [What is ISO 19650?](https://www.lunr.app/glossary/iso-19650): ISO 19650 is the international standard series for managing information about buildings and infrastructure across the life of an asset. Its six parts, information containers, status codes, the four CDE states, and adoption in Australia and the UK. - [Issued for Construction (IFC): meaning and IFA vs IFC](https://www.lunr.app/glossary/issued-for-construction): IFC means issued for construction: the status that releases a drawing for the works to be built from. See the status sequence from IFR to as-constructed, how IFC differs from IFA and issued for tender, and why the IFC model format shares the acronym. Includes a free drawing register template that tracks each drawing's status. - [Document numbering systems: a drawing number, decoded](https://www.lunr.app/glossary/document-numbering): A document numbering system gives every drawing and document a unique, structured identifier. Decode a worked drawing number field by field, compare intelligent and non-intelligent schemes, see the standards behind them, and find where renumbering at handover goes wrong. - [What are superseded drawings?](https://www.lunr.app/glossary/superseded-drawings): A superseded drawing is a revision replaced by a newer one, retired from use but kept on the record. How supersession differs from deletion, why superseded revisions must stay retrievable, and the risk of building from a superseded print. - [Controlled document: the 4 marks, and uncontrolled copies](https://www.lunr.app/glossary/controlled-document): A controlled document is one whose changes run through a defined process: a named owner, approval before release, tracked distribution, and a revision history. See the four marks of control, and what uncontrolled when printed means. - [What is an operation and maintenance (O&M) manual?](https://www.lunr.app/glossary/operation-and-maintenance-manual): An operation and maintenance manual is the compiled record of how a completed asset and its equipment are operated, serviced, and repaired, handed to the owner at practical completion. What it contains, who uses it, and why it decays. - [What is a native file? Native CAD formats vs a PDF plot](https://www.lunr.app/glossary/native-file): A native file is the drawing or model in the format its authoring application wrote, such as DWG, DGN, or RVT. See native set against derived on geometry, structure, xrefs, and metadata, and why asset owners take the natives at handover. - [RFI in construction: the workflow, the log, and the form](https://www.lunr.app/glossary/request-for-information): An RFI, or request for information, is a formal question raised during construction when the contract documents are unclear, incomplete, or in conflict. See the six-step RFI workflow, the columns an RFI log carries, what belongs on an RFI form, and why the answer has to reach the drawing. - [Issued for Review (IFR): drawing meaning and IFR vs IFC](https://www.lunr.app/glossary/issued-for-review): IFR means issued for review: a drawing released for comment, carrying no authority to build. See where IFR sits before IFA, IFT, and IFC, how the issue purpose is recorded in the revision block and the transmittal, and what IFP means. - [Uncontrolled when printed: meaning, and how to use a print](https://www.lunr.app/glossary/uncontrolled-when-printed): Uncontrolled when printed means the copy has left the document control system, so nothing guarantees it is the current revision. What the stamp means, where the wording appears, and how a QR code resolves a print back to the controlled document. - [Master document register (MDR): definition and columns](https://www.lunr.app/glossary/master-document-register): A master document register is the controlled list of every document a project or asset must produce and hold, with each document's number, title, revision, status, and responsible party. See the columns an MDR carries, and how it differs from a drawing register and a transmittal. - [EDMS: engineering document management system defined](https://www.lunr.app/glossary/edms): An EDMS is the controlled system an engineering organisation keeps its drawings, models, and technical documents in, each held as a numbered, revisioned record. See what an EDMS does, why the acronym covers both engineering and electronic document management, and how to tell which one a vendor means. ## Resources - [ISO 19650 explained: a guide for Australian asset owners](https://www.lunr.app/iso-19650): A complete ISO 19650 guide for asset owners: the six parts, the appointing party's duties, OIR, AIR, PIR, and EIR, the four common data environment states, status codes, adoption in Australia as AS ISO 19650, and a compliance path for the operational phase. - [Free document control templates for Excel](https://www.lunr.app/templates): Four free document control templates for Excel and CSV: drawing register, document register, transmittal register, and RFI register. Each ships with dropdowns, example rows, and a how-to sheet. No email required. - [Free drawing register template for Excel](https://www.lunr.app/templates/drawing-register): Free drawing register template for Excel and CSV. Track every drawing by number, revision, status, and transmittal, with dropdowns and example rows included. - [Free transmittal register template for Excel](https://www.lunr.app/templates/transmittal-register): Free transmittal register template for Excel and CSV. Log every document transmittal by number, date issued, recipient, documents sent, purpose of issue, and response due, with dropdowns and example rows included. - [Free document register template for Excel](https://www.lunr.app/templates/document-register): Free document register template for Excel and CSV. Track every controlled document by number, title, discipline, type, revision, status, and file location, with dropdowns and example rows included. - [Free RFI register template for Excel](https://www.lunr.app/templates/rfi-register): Free RFI register template for Excel and CSV. Log every request for information by number, date raised, subject, related documents, response due, and status, with dropdowns and example rows included. - [Customer case studies](https://www.lunr.app/customers): Case studies from the asset owners running their engineering record on Lunr, including the University of Canberra, which moved more than 20,000 campus documents off SharePoint and went live in July 2022. - [Blog](https://www.lunr.app/blog): Guides and articles on engineering document control: revision management, transmittals, as-constructed handover, XRAY search, and moving CAD and BIM drawings to the cloud. ## Company - [About Lunr Labs](https://www.lunr.app/about): Lunr is a product of Lunr Labs Pty Ltd, built by the team behind Onset Design in Melbourne, Australia. We make the cloud engineering document management platform that universities, utilities, energy companies, and government departments run their record on. - [Contact us](https://www.lunr.app/contact): Talk to the team behind Lunr about engineering document control, XRAY search, and handover for asset owners. We reply within one business day. Call +61 3 9803 9727 or email info@lunr.app. - [Security and compliance](https://www.lunr.app/security): How Lunr keeps controlled documents secure: hosted and operated by an ISO/IEC 27001:2022 certified partner in Australia and the US, SAML sign-in, a full audit trail behind every document, and data you can export at any time. - [Accessibility](https://www.lunr.app/accessibility): How the Lunr website supports accessibility: semantic structure, keyboard navigation, colour contrast, and reduced-motion support, aiming to conform to WCAG 2.2 Level AA. - [Privacy policy](https://www.lunr.app/privacy-policy): How Lunr Labs Pty Ltd collects, uses, stores, and discloses personal data across the Lunr service, in line with the Australian Privacy Principles and the GDPR. ## Case studies - [University of Canberra: 20,000 drawings under control](https://www.lunr.app/customers/university-of-canberra): The University of Canberra moved more than 20,000 campus documents off SharePoint onto Lunr. Selected through an RFQ tender, migrated with Onset Design, live on the main campus since July 2022, with XRAY search across scanned archives and Esri map search. ## Blog - [ISO 19650 and the Common Data Environment: A Practical Guide](https://www.lunr.app/blog/iso-19650-common-data-environment): ISO 19650 sets out how to manage information across a project and asset lifecycle. Learn what it asks of a common data environment, and how to meet those requirements in practice. - [What is a Drawing Management System, and How Do You Choose One?](https://www.lunr.app/blog/drawing-management-system): A drawing management system holds engineering drawings under revision control, with the CAD handling and controlled issue generic document management leaves out. What it does, and how to choose one. - [How will the CDE Evolve?](https://www.lunr.app/blog/how-will-the-cde-evolve): The Common Data Environment (CDE) is poised to reshape the roles of the Client, Asset Owner, and Occupier. Increasing volume and diversity of data in projects signals a promising evolution. - [Case Study - University of Canberra](https://www.lunr.app/blog/case-study-university-of-canberra): The University of Canberra is a young university with an impressive global reputation and a focus on promoting equal access to education. They chose Lunr to manage their campus documents. - [Transitioning to BIM Within a CDE](https://www.lunr.app/blog/transitioning-to-bim-within-a-cde): Using structured data in a CDE uncovers valuable insights, gaining more control over assets and projects. Sharing information with others will improve your operations and knowledge of facilities. - [Updates to the Lunr BIM Viewer](https://www.lunr.app/blog/updates-to-the-lunr-bim-viewer): We've recently added some new features to the BIM Viewer in Lunr. All users can now easily create Viewpoints and view property elements in the viewer without using specialist software. - [What is BIM?](https://www.lunr.app/blog/what-is-bim): Building Information Modelling (BIM) is reshaping the way we integrate building data into digital platforms, but what is it? - [Managing Project Data with Lunr](https://www.lunr.app/blog/managing-project-data-with-lunr): Lunr efficiently tracks and captures data, putting project and reporting tools at your fingertips. Being informed by the most up-to-date system information allows a focus on resourcing and planning. - [Integrating Lunr with Other Systems](https://www.lunr.app/blog/integrating-lunr-with-other-systems): The full value of your engineering content lies in its integration with other enterprise systems, allowing your organisation to harness more of your content. - [Understanding Asset Hierarchy](https://www.lunr.app/blog/understanding-asset-hierarchy): Lunr manages both 2D and 3D engineering documents on the cloud, and for most asset owners, contextualising this data within the organisation's asset hierarchy makes sense. - [Managing BIM Models with Lunr](https://www.lunr.app/blog/managing-bim-models-with-lunr): The BIM space is moving quickly as many enterprise sites seek to incorporate models and IFCs into their working process. - [As-Constructed Drawing Project Completion with Lunr](https://www.lunr.app/blog/as-constructed-project-delivery): The Lunr dashboard takes into account various factors to provide a realistic indication of your project's status, so you can make informed decisions. - [Why Move CAD Drawings to the Cloud?](https://www.lunr.app/blog/why-move-your-cad-drawings-to-the-cloud): It's not ideal when your entire Engineering Drawing Management System (EDMS) is really just one person. Easily improve that situation by moving your engineering documentation to the Lunr cloud. - [AutoCAD Attributes: Block Attributes, ATTDEF, and Title Block Data](https://www.lunr.app/blog/autocad-attributes): What a block attribute is in AutoCAD, how to define one with ATTDEF, how to edit one with ATTEDIT and BATTMAN, and why title block attributes matter to a drawing management system. - [Construction Document Communication](https://www.lunr.app/blog/as-constructed-communication): A look at communication methods used during the project and maintenance phases of an asset, and how Lunr allows you to tame this process and get your communications back under control. - [Drawing Revision Numbering: Letters, Numbers, and Rev 0 vs Rev 1](https://www.lunr.app/blog/drawing-revision-numbering): How drawing revision numbering works in practice: which letters the convention skips, what the first revision should be, when a drawing moves to rev 0 or rev 1, and where superseded revisions go. - [Engineering Drawing OCR: Scanning and Searching Legacy Drawings](https://www.lunr.app/blog/engineering-drawing-ocr): How OCR reads the text printed on an engineering drawing, what it pulls out of a title block, and how scanning a paper archive turns decades of drawings into something you can search. - [Sharing documents with Lunr](https://www.lunr.app/blog/sharing-documents): Sharing documents with Lunr | Lunr Engineering Content Management - [Tackling Engineering Project Costs with Submittal Package Validation](https://www.lunr.app/blog/submittal-package-validations): Package validation in Lunr reduces the feedback loop from drawing handover to acceptance and increases the likelihood that the original draftsperson is still on hand to make the required corrections. - [Understanding Controlled Documents](https://www.lunr.app/blog/controlled-documents): Lunr provides a way to manage controlled documents through the complete document lifecycle, while still allowing you the option of uploading uncontrolled documents as required. - [Understanding Document Workflow](https://www.lunr.app/blog/document-workflow): Lunr's document workflow allows controlled collaboration between all members of the project team, including staff, vendors, sub-contractors, and more. - [Understanding Transmittals](https://www.lunr.app/blog/understanding-transmittals): Document Transmittals are a formal process used by Engineering and Construction companies to send controlled documents or drawings to external companies, contractors, or vendors. - [What is a Redline Drawing, and How Do Redline Markups Work?](https://www.lunr.app/blog/cad-drawing-redlines): A redline drawing is a released sheet marked up in red to show what should change. What redline markups record, who drafts the change, and how construction redlines become the as-constructed record. - [A Better Way to Find your Engineering Content](https://www.lunr.app/blog/engineering-content-search): Lunr uses a combination of search, browse, and push methods to effectively engineer content retrieval and cater to all user needs. - [MicroStation Reference Files: Attachments, Levels, and the References Manager](https://www.lunr.app/blog/microstation-references): What a reference file is in MicroStation, what the References Manager lists, how assigning a level to a reference simplifies a combined model, and what to do when a moved file breaks an attachment. - [Engineering Document Management for Universities](https://www.lunr.app/blog/university-edm-with-lunr): Lunr offers Engineering Document Management (EDM) for universities, ensuring efficient project management, document accessibility, and enterprise system integration. - [Missing AutoCAD Xrefs?](https://www.lunr.app/blog/autocad-xrefs): Xrefs are a great feature during the design phase but may become a liability when drawing handover occurs. Lunr helps reduce the liability by checking for missing references when adding drawings.