computer science

Intermediate Data Format

Intermediate Data Format is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Intermediate Data Format rather than just read about it. In short: Intermediate Data Format (IDF) files are used interoperate between electronic design automation (EDA) software and solid modeling mechanical computer-aided design (CAD) software. The format was devised by David Kehmeier at the Mentor Graphics Corporation.

Key takeaways

Intermediate Data Format belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Intermediate Data Format to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Intermediate Data Format from memory before moving on to harder problems.

Reference excerpt

Intermediate Data Format (IDF) files are used interoperate between electronic design automation (EDA) software and solid modeling mechanical computer-aided design (CAD) software. The format was devised by David Kehmeier at the Mentor Graphics Corporation. The EMN File contains the PCB outline, the position of the parts, positions of holes and milling, keep out regions and keep in regions. The EMP file contains the outline and height of the parts. Some CAD software allows the use of a map file to load more detailed part models.

Compared to STEP STEP - also known as ISO 10303-21 - has both advantages and disadvantages over IDF. If both MCAD and ECAD software support STEP, both programs can interchange more detailed models (at the cost of increased file size). Step models that are rendered correctly in the ECAD software can cause problems in the MCAD. IDF does allow the communication of keep out areas and part placements more directly. IDF is a very simple and robust format. If necessary, the files can be edited by hand in a text editor.

External links IDF V3.0 Specification (PDF) IDF V4.0 Specification (PDF) IDF file parsing library

References

Worked examples

Example 1 — a first encounter with Intermediate Data Format

Start with the simplest possible case. Write down what Intermediate Data Format claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Intermediate Data Format before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Intermediate Data Format ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Intermediate Data Format

In research: Intermediate Data Format appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Intermediate Data Format in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Intermediate Data Format is common in secondary-school and first-year university syllabi. It links to neighbouring topics CAD file formats, Computer-aided design, Computing stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Intermediate Data Format outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Intermediate Data Format in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Intermediate Data Format means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Intermediate Data Format out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Intermediate Data Format in simple terms?

Why does Intermediate Data Format matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Intermediate Data Format?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Intermediate Data Format.